{"product_id":"k1-rock-tumbler-kit-reliable-rotary-rock-polisher-for-adults-beginners-hobbyists-2-5lb-quiet-rubber-barrel-with-3-speeds-9-day-timer-memory-function-full-accessories-included-ideal-gift","title":"K1 Rock Tumbler Kit – Reliable Rotary Rock Polisher for Adults, Beginners \u0026 Hobbyists, 2.5LB Quiet Rubber Barrel with 3 Speeds, 9-Day Timer \u0026 Memory Function, Full Accessories Included, Ideal Gift","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\u003eQuiet Enough For Home, Apartment \u0026amp; Hobby Room Use — The K1's 100% soft rubber barrel absorbs impact for 75% quieter operation — similar to a running dishwasher. Tumble rocks in your hobby space, or apartment without disturbing anyone around you. Quiet, reliable, and built for everyday home use.\u003c\/li\u003e\n\u003cli\u003eLCD Screen, 9-Day Timer \u0026amp; Memory Function — Set It And Walk Away — Features a built-in LCD display, 9-day programmable timer with automatic shutoff, 3-speed controls, and a memory function that automatically resumes your cycle after any power interruption. The perfect, hassle-free control system for beginners and hobbyists alike—just set your stage, walk away, and come back to perfectly tumbled stones.\u003c\/li\u003e\n\u003cli\u003e2.5LB Large Capacity — Polish More Rocks In Every Batch — The extra-large 2.5LB rubber barrel lets you polish 2.5× more rocks than standard 1LB barrels — ideal for adult hobbyists, beginners, and collectors who want real results. Perfect for processing agates, jasper, quartz, gemstones, sea glass, glass, coins. Just load, set, and enjoy the transformation.\u003c\/li\u003e\n\u003cli\u003eComplete Rock Tumbler Kit — Everything You Need To Start Today — Includes the tumbler, 2.5LB rubber barrel, 1LB rough rocks (9 types), 4 polishing grits, ceramic media, sifter, jewelry fastenings, 2 spare belts, and a full-color illustrated guidebook. No extra purchases needed — unbox and start tumbling on day one. Makes a complete, ready-to-use geology or STEM gift for adults, beginners, teens, and rock enthusiasts.\u003c\/li\u003e\n\u003cli\u003eProven 4-Stage Grit System + Pro Tips Guidebook — Includes a complete 4-stage grit kit (60\/120\/150\/1200) with precision ceramic media and a leak-proof stainless-steel lid for mess-free tumbling. Our exclusive full-color guidebook covers step-by-step techniques — including pro tips like adding soap water during polishing stages — to help you get the best results from every batch.\u003c\/li\u003e\n\u003cli\u003eBuilt to Last — Every Key Component Is Replaceable — Unlike tumblers that end up discarded when a single part wears out, the K1 is designed for long-term ownership. Motor, control panel, drive belt, rubber barrel, and metal lid kit are all available as individual replacement parts directly from KomeStone — with no planned end to parts supply. Replace what wears, keep what works. 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#7,257 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 (3,800) 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\u003eis assembly required\u003c\/td\u003e\n                  \u003ctd\u003eNo\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\u003e1200.0\u003c\/td\u003e\n                \u003c\/tr\u003e\n              \n                \u003ctr\u003e\n                  \u003ctd\u003emanufacturer minimum age months\u003c\/td\u003e\n                  \u003ctd\u003e156.0\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\u003e1.0 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":46225465802809,"sku":"B09PYR2RRT","price":59.98,"currency_code":"USD","in_stock":true},{"title":"Blue Border","offer_id":46225466163257,"sku":"B0B69CK2VG","price":99.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/9069\/9577\/files\/91nKtvDyhvL._AC_SL1500.jpg?v=1784519564","url":"https:\/\/radicalrocks.com\/products\/k1-rock-tumbler-kit-reliable-rotary-rock-polisher-for-adults-beginners-hobbyists-2-5lb-quiet-rubber-barrel-with-3-speeds-9-day-timer-memory-function-full-accessories-included-ideal-gift","provider":"Radical Rocks","version":"1.0","type":"link"}