Rock Tumbler Kit for Adults - 4LB Large Capacity Brushless Rock Polisher with Reinforced Metal Base, 3 Speeds & 9-Day Timer, Auto Shutoff & Memory Function, Complete Kit for Hobbyists & Collectors

Features

• Professional-Grade Performance For Serious Hobbyists: Designed for adults, hobbyists, and collectors who want more than basic entry-level tumblers. This professional rock tumbler kit combines precision control, durable construction, and reliable performance to help achieve consistent polishing results through every stage of the tumbling process. Ideal for polishing agates, jasper, tiger eye, quartz, and other popular gemstones.
• Brushless Motor & Heavy-Duty Metal Base Built To Last: Unlike traditional brushed motors that generate heat, carbon dust, and performance loss over time, the advanced brushless motor delivers stable power with reduced heat buildup for extended tumbling cycles. Combined with a reinforced heavy-duty metal base, this metal rock tumbler provides improved stability, reduced vibration, and long-term durability. Trusted by over 1 million users across KomeStone brushless rock tumbler models.
• 4lb Large-Capacity Rubber Barrel 75% Quieter For Home: The extra-large 4LB barrel handles larger batches of stones while reducing noise by up to 75% compared to plastic barrels. Made from durable tire-grade rubber, it absorbs vibration and helps create a quieter tumbling experience during multi-day polishing cycles. Ideal for garages, hobby rooms, workshops, and other indoor spaces.
• Smart Control: 3 Speeds, 9-Day Timer, Auto Shutoff & Memory Function: Fine-tune every polishing stage with three adjustable speeds and a programmable 9-day timer. Auto shutoff powers the machine down automatically when the cycle is complete, while memory function resumes operation using your previous settings after pauses or inspections. Designed for safer and more convenient unattended operation throughout long polishing projects.
• Complete Rock Tumbler Kit Ready To Start Polishing: Everything needed to begin tumbling right out of the box. Includes a 4LB rubber barrel, premium rough gemstones, 4-stage silicon carbide polishing grit set (4 bags), 2 spare drive belts, jewelry findings, mesh strainer, screwdriver, and a full-color instruction guide. Whether you're upgrading from a smaller tumbler or starting a new project, this complete kit helps you achieve professional-quality polishing results from day one.
• Long-term tumbling under heavy loads can cause natural wear on belts over time. Reach out to our support team to request 5 extra belts absolutely free: @..
• - & - : Enjoy peace of mind with our extended 90-day refund guarantee and 1-year warranty. If you miss Amazon's 30-day return window, simply contact our - team for - .
• KomeStone Built for Rock Tumbling Enthusiasts in the U.S.: From the popular K1 series to upgraded brushless motor models, KomeStone focuses on dependable performance and user-friendly design. Our lineup covers different needs: K Series K1, K1 Pro, K2 Elite (low-noise), K4 (dual-barrel), K5 (beginner-friendly); G Series G1 (4LB), G2 (8LB), G3 (22LB heavy-duty). We also offer a complete multi-stage grit system. KomeStone is committed to reliable tools and ongoing support for rock tumbling hobbyists.