Master mechanic, 25 piece, drill bit set, set consists of spade bits 1 each sizes: 3/8", 1/2", 5/8", 3/4", 7/8" & 1", black oxide bits sizes: (2) 1/16", (1) 5/64, (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (2) 3/16", (2)1/4", (1) 5/16" & (1) 3/8", rotary masonry bits 1 each sizes: 5/32", 3/16", 1/4", 5/16" & 3/8".