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These work great and easy to use got my daughter started on rock tumbling last christmas and to get the needed cushioning and high polish these are a must have.
Reviewed in the United States on September 14, 2024
Verified Purchase
Great stuff for rock tumblers. Be sure to run it with 60 grit in a Rotary toddler before using in a vibratory tumbler. It has somewhat sharp edges that can damp something like a TY-5 tumbler bowl a bit. Just run it a week in 60 grit first and it’s perfect for the TV-5 and TV-10 vibratory tumblers. Easy to use and lasts a very long time. Highly recommend this product.
Reviewed in the United States on September 14, 2024
Verified Purchase
If you tumble them, they will lose their sharp edges. I didn't find anything in them, just straight up ceramic. I have been using these to cushion rocks in the 3rd and 4th stages. So far so good!