100pcs Diamond Coated Needle Drill Bits

Diamond Drill Bits Coated Lapidary Solid Bits Needle for Jewelry Necklaces Earrings Pendants Bracelets Agate Suitable for agate jade ball beads barrel beads diamond punching. Use the pliers to cut off a little bit before using it. If you don't feel sharp, just drill the grinding wheel (that is, the grinding wheel of the iron). When you hit it, try to shorten the needle first. First, fix the positioning hole on both sides of the bead. Then clip a little longer and drill directly. Applicable machine: special high-speed drilling machine Please pay attention when using: speed above 5000; waterproof cooling and appropriate pressure, pay attention to light pressure and more advance and retreat. Excessive force can break.