Average Reviews:
(More customer reviews)I purchased these for my Dremel, thinking I was getting a great deal for the set. They are supposed to be diamond tipped burs for working with glass, ceramic, and stone. I purchased them to use with glass. Compared to the one diamond tipped Dremel brand bit that I already had, these didn't even compare. I did a simple test of trying to drill a small hole in a piece of glass. I used water to cool the heat of friction created by the spinning bit. The Dremel bit worked great and made a nice neat little hole in my glass. The bits from this set performed horribly. They wouldn't even go through a thin sheet of stained glass. They each overheated to the point where the tip glowed red and caused the glass to crack. Before the bit even made it through the glass, the diamond tipping actually came off so that the end of the bit was bald. I thought maybe I had a defective tip, so I repeated the same experiment with some more of the drilling bits with the same results. This was such a poor quality product that I just threw the rest of them away. If you think you're getting all these bits for a great deal, stop and think what purpose you really need diamond tipped bits for, then invest in one or two good quality tips from Dremel, itself. You'll get a much better quality product.
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30 TOUGH Diamond Burs (40 Grits) SetThis set is ideal for grinding, cleaning, cutting, polishing, etc This bits are coated with tough diamond particle This product is perfect for jewelers, hobby & craft, modelers, and other professions This set will last a long time, and you won't be disappointed This set comes in a protective plastic case for convenience The case is approximately 5 5/8" long by 2 7/16" wide You will receive 30 different types of these tough bits for your Dremel machine
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