Description: Material: Ball Milling Cutter made of tungsten steel material, high hardness, durable, corrosion resistance, rust resistance.Ussage: Beads Woodworking Tool can drill holes in any wood for quick and easy cutting, carving perfectly round beads.Apply Use beads to make bracelets, necklaces, jewelry, DIY handicrafts, home decorations, etc.Widely Applicable: Wood Bead Maker Drill Bit is very suitable for processing ebony, rosewood, deft knots, etc.Please Note: When processing hardwood, the drilling speed should be about 2600~2800, and it should not be pressed down hard, and the position of cutter and wood should not be moved during work. The width of the wood is 3~4mm wider than cutter blade. Specification: Material:tungsten steel Size Chart: Wood Bead Maker Drill Bit(cutting diameter): 6mm~16mmCenter Drill Bit(length): 5cm/7cm Package Includes: 6 Wood Bead Maker drill bit2 Center drill bit Note: Please allow slightly errors due to manual measurement and different monitors.