Replacement belts. How do I order?

Hi, here is the link for the belts: https://www.amazon.com/dp/B09S67HKV5/ Or just search KomeStone rock tumbler belts at amazon.com, then you'll find the belts. You are also welcome to follow our brand store on amazon.com through this link: https://www.amazon.com/stores/RockTumblerKit/page/98CD222F-C7A7-4372-80AE-0F0370A463C5 you'll find all accessaries related to our rock tumbelrs. If you want to contact our customer service, just email us via: support@komestone.com, we'll get back to you very soon!

Will the starter kit include all 9 kinds of stones or are there just some random rocks?

This rock tumbler kit includs 9 kinds of stones as advertised, weights around 1lb.

Can I tumble rocks we find at the park or do they have to be these special rocks?

You can tumble any rocks you’d like, I suggest you get a rock identification app, plus a hardness chart. The rocks you tumble need to be the same hardness or the softer rocks will disappear… this is a lot of fun and the outcome is beautiful

Can this tumbler be used to polish metal washers?

Based on two factors, yes it can. #1 The washer must be a metal that could be polished in a conventional method, such as a buffing machine. #2 That you are using a powder made for polishing. I will add that I do not recommend polishing metal items in a tumbler,

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KomeStone K1 Quiet Rock Tumbler Kit for Adults, Kids & Families | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit

Product ID: 412551126

🔇75% quieter rubber barrel

🪨2.5 lb tumbling capacity

⏲️9-day programmable digital timer

$269.50

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Description

🪨 Quiet power meets precision control—polish your passion in peace!

WHISPER QUIET TUMBLING - Experience up to 75% noise reduction with a thick rubber barrel—perfect for home, workshop, or family spaces without disruption.
ALL INCLUSIVE STARTER KIT - Everything you need to start polishing immediately—rocks, grits, media, tools, and a full-color guide—no extra purchases required.
MAXIMIZED POLISHING POWER - 2.5 lb capacity lets you process 2.5× more stones per batch, accelerating your creative projects and STEM learning.
BUILT TO LAST SUPPORT YOU - Replaceable parts and US-based customer service ensure your KomeStone K1 stays a permanent, reliable part of your creative journey.
PRECISION CONTROL AT YOUR FINGERTIPS - Set, pause, and resume your polishing stages effortlessly with a smart LCD timer and memory function—ideal for busy professionals and hobbyists alike.

The KomeStone K1 Quiet Rock Tumbler Kit is a top-rated, family-friendly polishing system featuring a 2.5 lb quiet rubber barrel, a 9-day programmable digital timer with memory, and three speed settings. Trusted by over 3 million hobbyists and backed by a 90-day money-back guarantee plus 1-year warranty, it includes all necessary materials and tools to start tumbling immediately. Designed for adults, kids, and beginners, it offers durable, replaceable parts and US-based support for long-term use.

Specifications

ASIN	B09PYR2RRT
Age Range Description	8 years and up
Best Sellers Rank	#6,287 in Toys & Games ( See Top 100 in Toys & Games ) #2 in Kids' Rock Tumblers
Brand Name	KomeStone
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (3,860)
Educational Objective	Teaching geology, creative design, patience
Included Components	1 pound of rocks & 4 bages of polishing grits & ceramic pellets, 1 rock tumbler base & 1 rubber barrel, 2 PU belts & user instructions, jewelry fastenings & adaptor & screwdriver & mesh strainer
Indoor Outdoor Usage	Indoor
Item Dimensions	11.22 x 9.02 x 5.71 inches
Manufacturer	KomeStone
Manufacturer Part Number	CA-KS0107RT17
Manufacturer recommended age	8 years and up
Material Type	Japanese carbon motor, Top quality of stainless steel, Tyre grade rubber, 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝
Model Number	K1
Number of Players	1
Operation Mode	Manual
Power Source	AC adapter
Set Name	KomeStone K1 Professional Large 2.5LB Capacity Edition
Size	Large
Supported Battery Types	No batteries required
Theme	Lapidary Tool for DIY Jewelry & Crafts, Perfect gift choice for the families or friends, Rock Tumbler Kit for Polishing Stones, Rock Tumbler Starter Kit with Timer & Motor, Rock Tumbler with Grits and Accessories, Stone Polishing Machine for Kids & Adults
Unit Count	1 Count

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$269.50

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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