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 1/8 in., 3/16 in., 1/4 in., and 5/16 in. The Titanium coating reduces friction and increases drilling speed in metal drilling applications.