C1 Pro Max Professional Rock Tumbler Kit - Large 3LB Capacity & Brushless Motor, Up to 6X More Noise Cancelling, Ultra Quiet Rotary Polisher with Full Accessories, Ideal for Adults Kids

I give this a 5 star mainly due to Daisy in customer support. When the tumbler arrived it would not work at all. I was going to return it, but i noticed the great customer service reviews. Not only did I get a rapid response , but was given concise instructions on what to do. I took a video, sent it to Daisy and the very next day was told that the problem was determined it to be a faulty adapter. She sent a new one, which arrived quickly. I plugged it in and it has been running for the past five days without a hitch. Thank you Daisy. Time will tell if I can polish rocks or not. After using the tumbler for about two weeks, polishing rocks that had already been worked using another tumbler, I am thoroughly happy. Considering the cost I feel it is a great little machine. I must admit that I purchased some 8000 grit, and found it did a better job than the 1200. The tumbler is quiet, (I have it in my den), runs without a hitch, and is easy to use. The combination of great customer support, and a machine that does all I want, I would recommend this, especially to the beginners and young geologists. The rocks look better than my mediocre photos.

Tumblr is working great and is pretty quiet (about the same as our clothes dryer). Customer Service is fantastic. We received the extra 1 pound bag of rocks after reaching out to the company based on the instructions posted. They were quick to respond and let us know as soon as they shipped out the rocks. We're really excited to see how oir first batch comes out, but I've already peaked on their progress and they're looking great!

Been using for about a month without issue. Much quieter than I expected, comparable to a dish washer. Easy to use and included guide helps you get started, customer service is good too. They offer additional rocks to tumble for free if you contact them via email and those came without issue too!

The good : This came with a lot of useful tools and information that my Nat Geo tumbler did not come with such as a screwdriver for just in case, very detailed directions, teflon tape to preserve the integrity of the barrel, and a replacement belt, just to name a few things. It also came with a bag of rocks and some ceramic media in addition to the grit packets. I also liked that it goes into detail about the importance of the Mohs hardness scale and how to use it to get better results. The less good: it is not very quiet as compared to the quiet nat geo tumbler. It is advertised as a 3 lb rock tumbler, but in the fine print says the 3 lbs is max capacity and that the optimal load should be around 1 lb. It tells you to lubricate the belt before your first tumble, but does not tell/show you where the belt is (I found it - little compartment on the back). They do not provide the lubricant for this step… I used what I had on hand: chain lube for my Bicycle It also advises to wrap the contact points on the barrel with the teflon tape they provide but, when I did this, the barrel wouldn’t rotate because it couldn’t get any traction (the tape is too smooth for this to work). In summation, it’s a good little tumbler, so far. I think it has room for improvement in the aforementioned areas, and prefer my quiet nat geo tumbler over this one because it actually holds more and is quiet. Time will tell how they compare regarding durability, but I just started my first batch and can’t speak to that just yet.

This is the third tumbler I’ve purchased, and I couldn’t be happier. The products are excellent—super quiet and they run very smoothly. Daisy provides great customer service and is always helpful. I highly recommend all of their products.

This is a quality tumbler that is well made, easy to operate and appears to be a workhorse after 6 months of continuous use. The tumbler is pretty quiet with rubber barrels and an enclosure to dull the sound of the tumbling action. Minimal maintenance required. A drop of oil on the belt every month or so and that's it. The barrels are easy to open and close with no leaking. Holds about 2.5 lbs of material per tumble at 2/3rds of barrel capacity. I've had good results tumbling both hard rocks such as agates and softer rocks like obsidian with the right recipe. I have 4 Koolstone tumblers running 24/7. I had an issue with a stripped lid attachment on the handle on one barrel. Koolstone customer service responded within two days and sent a new barrel at no charge within a week. The company stands by their product. Definitely recommend for rock tumbler hobbyists.

I received my KoolStone Rock Tumbler Kit promptly and everything was there. Being my first attempt at rock tumbling I was nervous about starting, but the Instruction Manual explained everything. It's so easy to use and I love the outcome of the rocks. I'm very pleased with this item.

The first unit to arrive did not turn on. The replacement unit has been tumbling now for weeks. Apparently better than a used Lortone i bought. Both tumblers work well.