Good Material - Made from tungsten steel and heat-treated, the blade features high precision, smooth cutting operation, good impact resistance and good toughness. High-speed steel shank, solid - Suitable for drill press, hammer drill, drill press, vertical drill, hand-held electric drill, stand motor drill, mobile band drill, etc. Drill Package includes 5PCS.can meet your different needs. Wide range of applications - All wood and wood products, plastic, plywood and other punching essential materials, suitable for industrial hinge installation, wood processing and maintenance, manufacturingde modèles, à l'installation de portes sphériques, de tiroirs et autres. Small cutting resistance, improve opening speed, easy chip and no shaking.