KomeStone G2 Dual-Barrel Professional Rock Tumbler Kit, 8LB for Adults

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• Designed for Serious Rock Tumbling Enthusiasts — Outgrown a single-barrel tumbler? Ready to process more volume without the wait or compromise? The G2 is built for adults, serious hobbyists, and collectors who tumble regularly and need more than a single-barrel setup can deliver. Whether you're upgrading from a G1, a 4 lb machine, or any single-barrel tumbler, this 8LB Dual-Barrel brushless system is the natural next step — built for high-output, regular-use tumbling. Backed by US-based support and fully replaceable parts.
• More Output, Less Waiting — Double 4LB barrels, unlike single-barrel tumblers that force you to wait between stages, let you run different stones or polishing stages simultaneously — up to 100% more output per session without extending individual run cycles. Handle larger batches, process multiple rock types at once, and complete more projects without the downtime. Both barrels use thick tire-grade rubber construction that reduces noise by up to 75% compared to plastic barrels — so more output doesn't mean more disruption.
• Parallel Tumbling for a Smarter Workflow — Run coarse grinding in one barrel while advancing fine polishing in the other, or tumble different stones with separate settings at the same time. Process rose quartz, tiger's eye, sea glass, and more without mixing materials or risking damage from different hardness levels. This 8LB Dual-Barrel system does more than increase capacity — it helps eliminate downtime between stages. While single-barrel tumblers require waiting, dual barrels keep multiple projects moving simultaneously for a more efficient tumbling experience.
• Built To Last with Heavy-Duty Brushless Motor & Reinforced Metal Base — Unlike traditional brushed motors, the brushless motor reduces friction, heat buildup, vibration, and mechanical wear for longer-lasting performance. Rated for 40,000+ hours of operation, it provides stable power under continuous dual-barrel loads without overheating or unexpected shutdowns. The reinforced metal base improves stability and minimizes vibration during extended tumbling cycles. KomeStone pioneered brushless motor technology in rock tumblers, with reliability trusted by over 1 million users in the U.S.
• Smart Controls with Pause, Resume and Settings Memory — Choose from 3 speed settings and program each polishing stage on the clear LCD screen with the adjustable 9-day digital timer. Pause the tumbler to check your stones, then resume without restarting your settings. Automatic shutoff stops the cycle when complete, while the memory function restores your settings after any power interruption — the perfect, hassle-free control system for serious hobbyists and collectors. Set your stage, walk away, and come back to perfectly tumbled stones.
• Complete Advanced Rock Tumbler Kit & Ready To Start Polishing — Everything needed for dual-barrel tumbling is included. Includes 2×4LB rubber barrels, 2 lbs of rough gemstones in 9 varieties (rose quartz, amethyst, aventurine, red jasper, tiger's eye, dalmatian stone, sodalite, lapis lazuli, black obsidian), 8 grit bags with two 4-stage silicon carbide sets (60/150/600/1200 grit), 2 spare belts, jewelry findings, mesh strainer, screwdriver, and color guide. No extra purchases needed — start polishing right out of the box and turn rough stones into keepsakes.
• Replaceable Key Parts for Long-Term Ownership — Core components are designed to be individually replaceable, not discarded. The motor, control panel, drive belt, rubber barrel, and metal lid kit are each available as replacement parts directly from KomeStone — with no planned end to parts supply. This 8LB Dual-Barrel rock tumbler isn't a one-season purchase. It's a permanent part of your hobby setup.
• 𝟗𝟎-𝐃𝐚𝐲 𝐌𝐨𝐧𝐞𝐲-𝐁𝐚𝐜𝐤 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲 — 𝐑𝐢𝐬𝐤-𝐅𝐫𝐞𝐞 𝐏𝐮𝐫𝐜𝐡𝐚𝐬𝐞 — Shop with complete confidence. Your G2 is backed by a 90-day satisfaction guarantee and a 1-year warranty. Miss Amazon's return window? Our US-based customer service team offers 24/7 hassle-free replacement or refund support — we've got you covered.
• 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.