Rock Grinding Bits Mm
1 mm Diamond Wire Drill . These are 1 mm wire drill bits. They are coated with 100 natural diamond. Use them for making holes in stones for jewelry, including beads, pendants and earrings. 332quot Core Drill. 8.00. 332quot Diamond Core Drill . This is a 332quot core drill bit. It is coated with 100 natural diamond.