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Brush Research GB31212 FLEX-HONE 3-1 2 inch
12th Jul 2026, 10:44 AM

Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Price may vary by location, shipping cost, and availability.
Lowest ever
$31.79

+ $6.93
Buy @ amazon.com
Highest: $31.79
Average: $31.79
Lowest: $31.79

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Price History Information

You can check the price history of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials here. This product's current Price in USA is $31.79. The average and highest prices are $31.79 and $31.79 respectively. The current offer price of the product is $38.72.

Lowest Ever Price $31.79
12th Jul 2026
Average Price $31.79
Based on 9 days price tracking
Highest Price $31.79
12th Jul 2026

Price History of All Variants of Brush Research GB31212 FLEX-HONE 3-1 2 inch...

Brush Research GB41824 FLEX-HONE 4-1834 105mm Diameter
Offer Price: $87.30

Brush Research GB41824 FLEX-HONE®, 4-1/8" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31232 Flex-Hone 3-1234 89mm Diameter
Offer Price: $67.54

Brush Research GB31232 Flex-Hone®, 3-1/2" (89mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB312800 Flex-Hone 3-1234 89mm Diameter
Offer Price: $122.99

Brush Research GB312800 Flex-Hone®, 3-1/2" (89mm) Diameter, 800 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31460 Flex-Hone 3-1434 83mm Diameter
Offer Price: $65.69

Brush Research GB31460 Flex-Hone®, 3-1/4" (83mm) Diameter, 60 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB33412 FLEX-HONE 3-3434 95mm Diameter

Brush Research GB33412 FLEX-HONE®, 3-3/4" (95mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45812 FLEX-HONE 4-5834 117mm Diameter

Brush Research GB45812 FLEX-HONE®, 4-5/8" (117mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31212 FLEX-HONE 3-1234 89mm Diameter
Offer Price: $38.72

Brush Research GB31212 FLEX-HONE®, 3-1/2" (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31432 Flex-Hone 3-1434 83mm Diameter
Offer Price: $64.43

Brush Research GB31432 Flex-Hone®, 3-1/4" (83mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31424 FLEX-HONE 3-1434 83mm Diameter
Offer Price: $40.97

Brush Research GB31424 FLEX-HONE®, 3-1/4" (83mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45812 FLEX-HONE 4-5834 117mm Diameter

Brush Research GB45812 FLEX-HONE®, 4-5/8" (117mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45818 FLEX-HONE 4-5834 117mm Diameter
Offer Price: $56.49

Brush Research GB45818 FLEX-HONE®, 4-5/8" (117mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31280 Flex-Hone 3-1234 89mm Diameter
Offer Price: $83.79

Brush Research GB31280 Flex-Hone®, 3-1/2" (89mm) Diameter, 80 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB33412 FLEX-HONE 3-3434 95mm Diameter
Offer Price: $43.25

Brush Research GB33412 FLEX-HONE®, 3-3/4" (95mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB33432 Flex-Hone 3-3434 95mm Diameter
Offer Price: $72.29

Brush Research GB33432 Flex-Hone®, 3-3/4" (95mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB33418 FLEX-HONE 3-3434 95mm Diameter
Offer Price: $41.68

Brush Research GB33418 FLEX-HONE®, 3-3/4" (95mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB314400 Flex-Hone 3-1434 83mm Diameter
Offer Price: $98.55

Brush Research GB314400 Flex-Hone®, 3-1/4" (83mm) Diameter, 400 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41812 FLEX-HONE 4-1834 105 mm
Offer Price: $49.88

Brush Research GB41812 FLEX-HONE®, 4-1/8" (105 mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB418400 Flex-Hone 4-1834 105mm Diameter
Offer Price: $123.99

Brush Research GB418400 Flex-Hone®, 4-1/8" (105mm) Diameter, 400 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB458400 Flex-Hone 4-5834 117mm Diameter
Offer Price: $187.99

Brush Research GB458400 Flex-Hone®, 4-5/8" (117mm) Diameter, 400 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31412 FLEX-HONE 3-1434 83mm Diameter
Offer Price: $35.20

Brush Research GB31412 FLEX-HONE®, 3-1/4" (83mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41818 FLEX-HONE 4-1834 105mm Diameter
Offer Price: $52.89

Brush Research GB41818 FLEX-HONE®, 4-1/8" (105mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45812 FLEX-HONE 4-5834 117mm Diameter
Offer Price: $57.02

Brush Research GB45812 FLEX-HONE®, 4-5/8" (117mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31224 FLEX-HONE 3-1234 89mm Diameter
Offer Price: $47.08

Brush Research GB31224 FLEX-HONE®, 3-1/2" (89mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31260 Flex-Hone 3-1234 89mm Diameter
Offer Price: $77.39

Brush Research GB31260 Flex-Hone®, 3-1/2" (89mm) Diameter, 60 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB314600 Flex-Hone 3-1434 83mm Diameter
Offer Price: $95.05

Brush Research GB314600 Flex-Hone®, 3-1/4" (83mm) Diameter, 600 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB314800 Flex-Hone 3-1434 83mm Diameter
Offer Price: $98.55

Brush Research GB314800 Flex-Hone®, 3-1/4" (83mm) Diameter, 800 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB334400 Flex-Hone 3-3434 95mm Diameter
Offer Price: $104.50

Brush Research GB334400 Flex-Hone®, 3-3/4" (95mm) Diameter, 400 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB334800 Flex-Hone 3-3434 95mm Diameter
Offer Price: $124.99

Brush Research GB334800 Flex-Hone®, 3-3/4" (95mm) Diameter, 800 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41860 Flex-Hone 4-1834 105mm Diameter

Brush Research GB41860 Flex-Hone®, 4-1/8" (105mm) Diameter, 60 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB334600 Flex-Hone 3-3434 95mm Diameter

Brush Research GB334600 Flex-Hone®, 3-3/4" (95mm) Diameter, 600 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45824 FLEX-HONE 4-5834 117mm Diameter
Offer Price: $56.37

Brush Research GB45824 FLEX-HONE®, 4-5/8" (117mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31218 FLEX-HONE 3-1234 89mm Diameter
Offer Price: $48.93

Brush Research GB31218 FLEX-HONE®, 3-1/2" (89mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41880 Flex-Hone 4-1834 105mm Diameter
Offer Price: $138.68

Brush Research GB41880 Flex-Hone®, 4-1/8" (105mm) Diameter, 80 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB45832 Flex-Hone 4-5834 117mm Diameter
Offer Price: $117.40

Brush Research GB45832 Flex-Hone®, 4-5/8" (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB31418 FLEX-HONE 3-1434 83mm Diameter
Offer Price: $39.79

Brush Research GB31418 FLEX-HONE®, 3-1/4" (83mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41832 Flex-Hone 4-1834 105mm Diameter
Offer Price: $82.12

Brush Research GB41832 Flex-Hone®, 4-1/8" (105mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB334600 Flex-Hone 3-3434 95mm Diameter
Offer Price: $117.99

Brush Research GB334600 Flex-Hone®, 3-3/4" (95mm) Diameter, 600 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB312400 Flex-Hone 3-1234 89mm Diameter
Offer Price: $102.05

Brush Research GB312400 Flex-Hone®, 3-1/2" (89mm) Diameter, 400 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB41860 Flex-Hone 4-1834 105mm Diameter
Offer Price: $76.67

Brush Research GB41860 Flex-Hone®, 4-1/8" (105mm) Diameter, 60 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB312600 Flex-Hone 3-1234 89mm Diameter
Offer Price: $83.50

Brush Research GB312600 Flex-Hone®, 3-1/2" (89mm) Diameter, 600 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Brush Research GB33424 FLEX-HONE 3-3434 95mm Diameter
Offer Price: $57.12

Brush Research GB33424 FLEX-HONE®, 3-3/4" (95mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Get Deal

Current Price in USA

Price $31.79

Product Information

Details

Product Name Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Store Product Code B002XUL1DK
Store Name amazon.com
Brand Flex-Hone
Rating 9.4 / 10
Category Flex Hones
Product Manufacturer Brush Research Manufacturing

Features

  • [QUALITY]-Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
  • [DESIGN]-The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
  • [FINISHING BENEFITS]-Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
  • [CROSSHOLE DEBURRING]-Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
  • [120 GRIT SILICON CARBIDE ABRASIVE]-Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 35 - 50 Microinch (.9 - 1.4 Micrometer).
  • [WHAT'S INCLUDED]-1 Each of a GB Standard Duty FLEX-HONE: 3.500" (89mm) Bore Diameter, 3.50" Abrasive Part Length, 0.310" Shank Diameter, 13.5" Overall Length. For Use on Bore Diameters Between 3.251"-3.500". PLEASE NOTE: ORDER BY BORE SIZE.

Images

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Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Image of Brush Research GB31212 FLEX-HONE, 3-1 /2 inch (89mm) Diameter, 120 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Rating and Reviews

9.4 Based on 158 reviews

Brush Research GB31212 FLEX-HONE 3-1 2 inch has 9.4 rating out of 10. This average rating is consist of 158 individual ratings. You can rate this product at product review page.

* Predictions is created on based of past prices and trends, it does not guarantee that it will happen. These are just prediction for theoretical information only.
Buy @ amazon.com