{"product_id":"k1-quiet-rock-tumbler-kit-for-adults-kids-hobbyists-reliable-2-5lb-rotary-rock-polisher-thick-rubber-barrel-3-speeds-9-day-timer-memory-function-complete-gem-polishing-kit","title":"K1 Quiet Rock Tumbler Kit for Adults, Kids \u0026 Hobbyists | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit","description":"\n      \u003cdiv\u003e\n        \n        \n          \u003ch3\u003eAbout this item\u003c\/h3\u003e\n          \u003cul\u003e\n            \u003cli\u003eTrusted by 3,000,000+ Hobbyists — Ranked #1 by Independent Review Publications — Named the top rock tumbler by NBC's Today, BestReviews, BuyerGuide, and more (2022–2026) — recognized for performance, reliability, and value. With over 3,000,000 orders shipped across KomeStone's lineup as of July 2026, it's the trusted choice for adults, hobbyists, and families who want a dependable tumbler that delivers real results.\u003c\/li\u003e\n\u003cli\u003eDesigned for Adults, Kids, Teens, and Families — Built for anyone who wants a quiet, reliable tumbler for everyday home use. The 2.5 lb capacity makes it the ideal first step up from a standard 1 lb beginner kit — and with dedicated US-based support and replaceable components, the K1 is a machine adults and hobbyists trust, kids and teens can start on, and beginners can genuinely learn from.\u003c\/li\u003e\n\u003cli\u003e75% Quieter Rubber Barrel with 2.5 lb Capacity — Process agates, jasper, quartz, gemstones, sea glass, and most popular tumbling stones. The 2.5 lb barrel gives you 2.5× the capacity of a standard 1 lb barrel, letting you polish more stones per batch. Its thick rubber construction cushions rock impact and reduces noise by up to 75% compared to plastic barrels — comparable to a running dishwasher — for a comfortable tumbling experience in living rooms, garages, workshops, and hobby spaces.\u003c\/li\u003e\n\u003cli\u003eSmart 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 beginners and hobbyists alike. Set your stage, walk away, and come back to perfectly tumbled stones.\u003c\/li\u003e\n\u003cli\u003eComplete Rock Tumbler Kit — Ready to Unbox and Start on Day One — Includes the K1 tumbler, a thick 2.5 lb rubber barrel, 1 lb of rough rocks in 9 varieties sourced from around the world, four bags of 60\/120\/150\/1200 polishing grit, ceramic tumbling media, a mesh strainer, jewelry findings, 3 drive belts, and a full-color illustrated guide. No additional purchases needed — everything required to begin your first polishing batch is already in the box.\u003c\/li\u003e\n\u003cli\u003eStep-by-Step Guidance for Every Level — The included full-color guidebook covers everything from initial setup to finishing your first batch — with detailed polishing techniques, troubleshooting steps, and practical tips like adding soapy water during polishing stages. Our US-based support team is also available anytime for polishing questions or machine help. Together, the comprehensive guidance and dedicated support help adults, beginners, teens, and families make real progress — from rough stones to finished keepsakes. Makes a complete geology or STEM gift for rock enthusiasts of all ages.\u003c\/li\u003e\n\u003cli\u003eReplaceable 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. The K1 isn't a one-season purchase — it's a permanent part of your hobby setup.\u003c\/li\u003e\n\u003cli\u003e𝟗𝟎-𝐃𝐚𝐲 𝐌𝐨𝐧𝐞𝐲-𝐁𝐚𝐜𝐤 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 \u0026amp; 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲 — 𝐑𝐢𝐬𝐤-𝐅𝐫𝐞𝐞 𝐏𝐮𝐫𝐜𝐡𝐚𝐬𝐞 — Shop with complete confidence. Your K1 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.\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cdiv\u003eTumbling Refill Grit Kit\nReliable Home Tumbling\nAdvanced Hobby Tumbling\nQuiet Premium Tumbling\nDurable Metal Build\nWorkshop Grade\nKomeStone has quickly become a trusted name in rock tumbling, known for durable, innovative designs and a customer-first\napproach. With a growing lineup of hobby tumblers, larger-capacity machines, grit refills, ceramic media, and polish supplies,\nKomeStone offers a complete rock tumbling system for beginners, families, hobbyists, and serious collectors.\u003c\/div\u003e\n        \n          \u003ch3\u003eProduct Details\u003c\/h3\u003e\n          \u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse: collapse;\"\u003e\n            \u003cthead\u003e\n              \u003ctr\u003e\n                \u003cth style=\"text-align:left;\"\u003eProperty\u003c\/th\u003e\n                \u003cth style=\"text-align:left;\"\u003eValue\u003c\/th\u003e\n              \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eage range description\u003c\/td\u003e\n                  \u003ctd\u003e13 years and up\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003easin\u003c\/td\u003e\n                  \u003ctd\u003eB09PYR2RRT\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003ebest sellers rank\u003c\/td\u003e\n                  \u003ctd\u003e#5,173 in Toys \u0026amp; Games (See Top 100 in Toys \u0026amp; Games) #3 in Kids' Rock Tumblers\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003ebrand name\u003c\/td\u003e\n                  \u003ctd\u003eKomeStone\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003ecolor\u003c\/td\u003e\n                  \u003ctd\u003eBlack\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003ecustomer reviews\u003c\/td\u003e\n                  \u003ctd\u003e4.3 4.3 out of 5 stars (3,824) 4.3 out of 5 stars\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eeducational objective\u003c\/td\u003e\n                  \u003ctd\u003eTeaching geology, creative design, patience\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eincluded components\u003c\/td\u003e\n                  \u003ctd\u003e1 pound of rocks \u0026amp; 4 bages of polishing grits \u0026amp; ceramic pellets, 1 rock tumbler base \u0026amp; 1 rubber barrel, 2 PU belts \u0026amp; user instructions, jewelry fastenings \u0026amp; adaptor \u0026amp; screwdriver \u0026amp; mesh strainer\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eindoor outdoor usage\u003c\/td\u003e\n                  \u003ctd\u003eIndoor\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eitem dimensions\u003c\/td\u003e\n                  \u003ctd\u003e11.22 x 9.02 x 5.71 inches\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emanufacturer\u003c\/td\u003e\n                  \u003ctd\u003eKomeStone\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emanufacturer maximum age months\u003c\/td\u003e\n                  \u003ctd\u003e1200\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emanufacturer minimum age months\u003c\/td\u003e\n                  \u003ctd\u003e156\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emanufacturer part number\u003c\/td\u003e\n                  \u003ctd\u003eCA-KS0107RT17\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003ematerial type\u003c\/td\u003e\n                  \u003ctd\u003eJapanese carbon motor, Top quality of stainless steel, Tyre grade rubber, 𝐂𝐏𝐒𝐈𝐀 \u0026amp; 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emodel number\u003c\/td\u003e\n                  \u003ctd\u003eK1\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003enumber of players\u003c\/td\u003e\n                  \u003ctd\u003e1\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eoperation mode\u003c\/td\u003e\n                  \u003ctd\u003eManual\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003epower source\u003c\/td\u003e\n                  \u003ctd\u003eAC adapter\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eset name\u003c\/td\u003e\n                  \u003ctd\u003eKomeStone K1 Professional Large 2.5LB Capacity Edition\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003esize\u003c\/td\u003e\n                  \u003ctd\u003eLarge\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003esupported battery types\u003c\/td\u003e\n                  \u003ctd\u003eNo batteries required\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003etheme\u003c\/td\u003e\n                  \u003ctd\u003eLapidary Tool for DIY Jewelry \u0026amp; Crafts, Perfect gift choice for the families or friends, Rock Tumbler Kit for Polishing Stones, Rock Tumbler Starter Kit with Timer \u0026amp; Motor, Rock Tumbler with Grits and Accessories, Stone Polishing Machine for Kids \u0026amp; Adults\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003eunit count\u003c\/td\u003e\n                  \u003ctd\u003e1 Count\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n            \u003c\/tbody\u003e\n          \u003c\/table\u003e\n               \n\n      \u003c\/div\u003e\n    ","brand":"Radical Rocks","offers":[{"title":"Black","offer_id":46276191715385,"sku":"B09PYR2RRT","price":52.33,"currency_code":"USD","in_stock":true},{"title":"Blue Border","offer_id":46276191748153,"sku":"B0B69CK2VG","price":75.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/9069\/9577\/files\/91nKtvDyhvL._AC_SL1500_8f7aebd4-c8c4-4c53-999d-469a0b6b3bcb.jpg?v=1785864355","url":"https:\/\/radicalrocks.com\/products\/k1-quiet-rock-tumbler-kit-for-adults-kids-hobbyists-reliable-2-5lb-rotary-rock-polisher-thick-rubber-barrel-3-speeds-9-day-timer-memory-function-complete-gem-polishing-kit","provider":"Radical Rocks","version":"1.0","type":"link"}