The Ryobi Speed Load Plus 4-piece Hex Shank Titanium Drill Bit Set is for use with drilling into wood, plastic, and metal. The kit includes Titanium High Speed Steel Drill Bits in sizes of 1/16 in., 3/32 in., 7/64 in., and 1/8 in. The Titanium coating reduces friction and increases drilling speed in metal drilling applications.