Diamond Coated Twist Drills – Straight Shank
These diamond twisted cylinder bits are used for reaming pearls and drilling holes in glass. Because of their twist–shape, these bits drill faster than the above diamond cylinder bits. Twisted cylinder bits are electroplated with #120 industrial diamond powder. Use on a drill press or flex shaft with the proper collet. Tip sizes are approximate. Shank size is slightly smaller than tip size.