Made of high-quality materials and heat-treated, it has the characteristics of high , smooth cutting operation, good impact resistance, and good toughness. High-speed steel handle, sturdy and - suitable for drill presses, drills, bench drills, vertical drills, handheld electric drills, vertical electric drills, and mobile belt magnetic drills, etc. Drill bit package includes 4 pieces, (12+14+15+16) mm, which can meet your different needs. Small cutting resistance, increase opening speed, fragile and no vibration. Wide range of applications - any wood and wood products, plastics, plywood and other materials require exquisite perforation, suitable for industrial hinge installation, wood processing and maintenance, model making, ball door installation, drawers and other occasions. Can better meet the needs of DIY makers. Colour:Black Material:Cemented Carbide Package Contents: 1 set * Wood hole saw drill bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.