7 Piece Masonry Hammer Drill Bit Set for use in Concrete & Block - contains the following bits: (1) 3/16" x 3 - 3/8" (2) 1/4" x 4" (1) 1/4" x 6" (1) 5/16" x 6" (1) 3/8" x 6" (1) 1/2" x 6". All bits have carbide tips for maximum strength drilling using standard drills and hammer drive drills