15 Piece, Turbomax, Turbo Point, Drill Bit Set, Revolutionary Tip Design Stays Sharper Longer & Drills Up To 28 Percent Faster, 3 Flatted Shank Design Provides Better Chuck Grip & Reduces Slippage, Ideal For Use In Keyless Chucks, Bit Is Constructed Of M-2 High Speed Steel For Strength, Heat Resistance & Wear Resistance, Durable Rubber-Sided Case For Added Impact Resistance, Set Includes (2) 1/16", (1) 5/64", (2) 3/32", (1)7/64", (2) 1/8, (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4, (1) 5/16 & (1) 3/8" Turbo Point Bits.