Classic High Speed Steel (HSS) construction with a titanium coating provides ultimate durability and longer drill bit service life through multiple uses without deformation.The cutting edge is hardened and honed for sharpness and features a chatter-free design with staggered cutting teeth to ensure precise countersinking and clean, smooth holes.Sizes: 28 x 3/64″, 27 x 5/64″, 20 x 1/8″, 10 x 5/32″, 12 x 3/16″, 8 x 15/64″, 8 x 9/32″, 3 x 5/16″, 2 x 23/64″, 1 x 1/2″, 27 x 1/16″, 27 x 3/32″, 20 x 9/64″, 10 x 11/64″, 10 x 7/32″, 12 x 1/4″, 2 x 19/64″, 2 x 21/64″, 1 x 3/8″.Precision 135 degree split point and twist design with gold oxide finish and round straight shanks increases the cutting speed. Easy self centering prevents walking. Twist design and two flute form also ensures the drill bit can quickly clear out any particles or chips, leaving a smooth and clean hole and decreasing the friction and heat for a cooler and faster drilling process.Supplied in an organized drill bit case with sizing information for easy storage and convenience. Suitable for a bench drill, conventional electric drill, hand drill and is ideal for wood, carbon steel, sheet steel, fiberboard, rubber, plywood, PVC, plastic etc.