1 Inch Silver And Deming Reduced Shank Industrial Drill Bit Hss, 1/2" Shank POINT DESIGN: 135 split point design increases cutting speed with self-centering feature and prevents drill bit walking or wobbling on working surface. REDUCED SHANK with THREE FLATS: 1/2" reduced shank drill bit with tri-flat is designed to eliminate drill bits spinning in the chuck and ensures grip. Superior black oxide finish offers great wear resistance. WIDE FLUTE: Parabolic flute design improves chips removal and prolongs drill bits life while drilling in metal and wood. GENERAL PURPOSE: It is ideal for drilling steel, copper, aluminum, brass, oak, maple, pines, PVC, ABS, polycarbonate, acrylic, nylon and composite materials. PACKAGING: 3 pcs in one package. Each drill bit is in one plastic tube, and three tubes are in one paper carton. This packaging protects drill bit well from bomping against each other and also is convienent for storage.