The Ryobi 12-Piece Rotary Masonry Bit Set features a dozen drill bits for use with your percussion drill that can help make fast work of many different masonry applications. Set includes two 1/8 in. x 3 in., two 5/32 in. x 3 in., two 3/16 in. x 3 in., three 1/4 in. x 4 in., one 5/16 in. x 4 in., one 3/8 in. x 6 in. and one 1/2 in. x 6 in. bit.