Customer Reviews for Pro-Quality 20-Piece Diamond-Point Bit Set for Rotary Tool - Glass, Stone, Ceramic

Pro-Quality 20-Piece Diamond-Point Bit Set for Rotary Tool - Glass, Stone, Ceramic
by SE

Pro-Quality 20-Piece Diamond-Point Bit Set for Rotary Tool - Glass, Stone, Ceramic List Price: $7.50
Our Price: $1.99
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Tools and Hardware Reviews of Pro-Quality 20-Piece Diamond-Point Bit Set for Rotary Tool - Glass, Stone, Ceramic

Customer Review: Way better than I expected for the price!
Summary: 5 Stars

I am a model builder and that's what I use these for. All I can say is they work very well, and for the price I am absolutely delighted with them!

Customer Review: great
Summary: 5 Stars

i use these to add more detail and deepen details on my warhammer 40k pieces. they hold up great just what i needed

Customer Review: great tools
Summary: 5 Stars

this set is great this with a dremel 400 XPR i can even
carve on chicken eggs they work very well

Customer Review: What a bargain
Summary: 5 Stars

I only used two of the bits so far. They worked wonderfully. I was able to use them in my Dremel just fine.

Customer Review: Good deal for the price
Summary: 4 Stars

This set of 20 bits costs less than one high-quality diamond bit from other sources, and the bits did the job for which they were purchased.

Used them to drill two 1/8 inch diameter holes in non-tempered window glass. This must be done slowly to avoid overheating and possibly fracturing the glass. Used several different bits to change shapes in the hope of making it go faster. When done, the holes were fine and all of the bits still seemed to have their abrasive surfaces.

I've read elsewhere that a high-quality diamond bit will last for perhaps three holes like these, and that it takes about two minutes to make one hole. Well, it took about 30 minutes per hole, but more than half of that time was spent pausing to let the glass and bit cool off. Since all of the bits still have diamond grit on them, it seems likely that they'll be able to make several more holes before wearing out.

NOTE: Tempered glass probably will shatter if drilled. This window didn't have a "tempered" logo in the corner and looked normal when viewed through polarized sunglasses.
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