IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Cobalt Steel Drill Bit Sets, constructed out of Cobalt Steel, are designed for drilling stainless steel, hard steel, wood and plastic. The precision ground, gold-finished Cobalt Steel retains hardness at high temperatures and withstands abrasion and heat generated by hard to machine metals. These jobber length bits feature a 135-degree split point for fast penetration and accurate self centering. These bits come packaged in a sturdy metal case with a hinged index and sizes clearly visible. This 13-piece drill set includes: 1/16-inch through 1/4-inch in 1/64-inch increments as follows: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4-Inch drill bits.