ZEERMENG 10pc 2 Diamond Bead Reamer Set 1/16 x 7/8 For Dremel Rotary Tool 1/8

Q: Can I use these to drill beach glass? Does the bit need to be kept wet?

You can use this drill bit to drill glass. Due to the excess heat when drilling and to avoid cracking your glass, you should always wet the bit when drilling.

Q: Are these all the same size/diameter?

They are really good. Perfect size. I enjoy working eith them. Thank you.

Q: What's the diameter of the tip? I need it to be about 0.5mm.

Using my digital micrometer, I measure the very tip of one as being about 0.60-0.65mm, tapering up to 2.0mm at the largest point of the coated portion of the tip.