Dual-Barrel Rock Tumbler Kit - 8LB Extra Large Capacity (4LB x 2), Brushless Motor & Heavy Metal Base, 3 Speeds & 9-Day Timer, Rock Polisher for Adults & Collectors, Full Accessories Included

Features

• 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.
• More Output, Less Waiting DOUBLE 4LB Barrels For Adults & Serious Collectors : Unlike single-barrel tumblers that force you to wait between stages, two 4LB barrels let you run different stones or polishing stages simultaneously. Handle larger batches, process multiple rock types at once, and complete projects up toup to 100% more output per session without extending individual run cycles. The rock tumbler for adults who want real results, not just a starter kit.
• Parallel Tumbling For A Smarter, More Efficient Workflow : Run coarse grinding in one barrel while advancing to fine polishing in the other or process stones of different hardness levels at the same time. This dual-barrel system doesn't just add capacity; it eliminates the idle time between stages that single-barrel tumblers require, making your entire workflow fundamentally more efficient.
• Heavy-Duty Brushless Motor & Reinforced Metal Base Built To Outlast : Unlike brushed motors prone to heat buildup and premature wear, the high-efficiency brushless motor in this heavy duty rock tumbler delivers stable, low-heat output for up to 40,000 hours over a decade of reliable use. The reinforced metal base reduces vibration and supports consistent operation through extended tumbling cycles. KomeStone was among the first to bring brushless motor technology to rock tumblers, with reliability validated by over 1 Million users in the U.S.
• Smart Controls For Precise, Multi-Stage Polishing : Program each stage with precision using 3 adjustable speeds and a 9-day programmable timer matched to your tumbling cycle. Auto shut-off and memory function allow safe, unattended operation so your stones keep polishing even when you step away. Smart control technology refined through extensive real-world use ensures consistent, repeatable results every time.
• Complete Advanced Kit Everything You Need To Start Tumbling : Includes 24LB rubber barrels, 2lb premium rough gemstones, complete 4-stage polishing grit set(8 bags), 2 spare belts, screwdriver, jewelry findings, mesh strainer, and a full-color instruction manual Book everything required for a full multi-stage project right out of the box. Designed for serious hobbyists and collectors who want a more capable, efficient rock tumbling experience, it also makes a premium gift choice for enthusiasts and hobby starters alike.
• - & - : 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 is designed for rock tumbling enthusiasts in the U.S., offering rock tumbling machines and grit systems for beginners and hobby users. The lineup includes the K Series: K1, K1 Pro, K2 Elite with noise-reduction design, K4 dual-barrel model with upgraded motor, and K5 beginner-friendly model. The G Series includes G1 (4LB), G2 (8LB), and G3 (22LB heavy-duty metal base). Select models feature upgraded motor designs, including brushless motor options. A complete grit system is also available for multi-stage tumbling, lapidary finishing, and gemstone polishing applications.