---
product_id: 412551126
title: "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"
brand: "komestone"
price: "€ 188.03"
currency: EUR
in_stock: true
category: "Kome Stone"
url: https://www.desertcart.at/products/412551126-k1-rock-tumbler-kit-reliable-rotary-rock-polisher-for-adults
store_origin: AT
region: Austria
---

# 9-day programmable timer 75% quieter operation 3-speed motor control 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

**Brand:** komestone
**Price:** € 188.03
**Availability:** ✅ In Stock

## Summary

> 💎 Polish Like a Pro, Quietly & Effortlessly!

## Quick Answers

- **What is this?** 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 by komestone
- **How much does it cost?** € 188.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/412551126-k1-rock-tumbler-kit-reliable-rotary-rock-polisher-for-adults)

## Best For

- komestone enthusiasts

## Why This Product

- Trusted komestone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Maximized Capacity:** Extra-large 2.5LB barrel polishes 2.5× more rocks per batch—ideal for serious hobbyists and collectors.
- • **Set & Forget Precision:** 9-day programmable timer with memory function lets you walk away and return to flawless polished stones.
- • **Whisper-Quiet Tumbling:** Soft rubber barrel reduces noise by 75%, perfect for home or apartment use without disruption.
- • **Hassle-Free Maintenance:** User-replaceable drive belt and durable design keep your hobby uninterrupted and your tumbler running longer.
- • **Complete Ready-to-Use Kit:** Includes rocks, 4-stage grit system, ceramic media, and all accessories—start tumbling the moment you unbox.

## Overview

The K1 Rock Tumbler Kit is a top-rated, quiet rotary polisher featuring a 2.5LB soft rubber barrel, 3-speed motor, and a 9-day programmable timer with memory. Trusted by thousands and ranked #1 by NBC's Today and BestReviews, it includes a complete 4-stage grit system, ceramic media, and all accessories needed to start polishing immediately. Designed for adults, beginners, and hobbyists, it offers whisper-quiet operation, easy maintenance, and a risk-free purchase backed by a 90-day money-back guarantee and 1-year warranty.

## Description

Buy 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: Tumbling Media - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- Ranked #1 By NBC's Today, BestReviews & More — Trusted By Thousands Of Hobbyists — The KomeStone K1 was independently ranked the #1 Rock Tumbler by leading review publications including NBC's Today, BestReviews, BuyerGuide, and more — recognized for performance, reliability, and value. Trusted by thousands of adults, hobbyists, and families who want a dependable tumbler that delivers real results.
- Quiet Enough For Home, Apartment & 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 living room, hobby space, or apartment without disturbing anyone around you. Quiet, reliable, and built for everyday home use.
- LCD Screen, 9-Day Timer & 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. Set your stage, walk away, and come back to perfectly tumbled stones.
- 2.5LB 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 and collectors who want serious results. Perfect for processing agates, jasper, quartz, gemstones, sea glass, glass, coins. Just load, set, and enjoy the transformation.
- Complete 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, teens, and rock enthusiasts.
- Proven 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.
- Easy Maintenance — User-Replaceable Drive Belt — The K1's durable drive belt is designed to be user-replaceable — no special tools, no service calls. Simple maintenance keeps your tumbler running longer and your hobby uninterrupted.
- 𝟗𝟎-𝐃𝐚𝐲 𝐌𝐨𝐧𝐞𝐲-𝐁𝐚𝐜𝐤 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 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 desertcart's return window? Our US-based customer service team offers 24/7 hassle-free replacement or refund support — we've got you covered.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09PYR2RRT |
| Age Range Description | 13 years and up |
| Best Sellers Rank | #4,871 in Toys & Games ( See Top 100 in Toys & Games ) #2 in Kids' Rock Tumblers |
| Brand Name | KomeStone |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (3,772) |
| 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 |
| Is Assembly Required | No |
| Item Dimensions | 11.22 x 9.02 x 5.71 inches |
| Manufacturer | KomeStone |
| Manufacturer Maximum Age (MONTHS) | 1200.0 |
| Manufacturer Minimum Age (MONTHS) | 156.0 |
| Manufacturer Part Number | CA-KS0107RT17 |
| Material Type | Japanese carbon motor, Rubber, Stainless Steel, 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 | 1.0 Count |

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/81kPmz+9AHL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Replacement belts. How do I order?**
A: 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!

**Q: Will the starter kit include all 9 kinds of stones or are there just some random rocks?**
A: This rock tumbler kit includs 9 kinds of stones as advertised,  weights around 1lb.

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

**Q: Can this tumbler be used to polish metal washers?**
A: 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,

## Frequently Bought Together

- Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included
- Rock Tumbler Polishing Grits and Ceramic Tumbling Media Kit | Essential for Polishing, 4 Steps Rock Tumbling Refill Media, Polish up to 25 lbs of Rocks, Work with Any Rock Tumblers, for More Tumbles

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-07-08*