Master Mechanic, MMWK31DDSW, 31 Piece Titanium High Speed Drills and Drive Set. Set includes titanium HSS Drill Bits: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 and 5/16 inch sizes. Sixteen 1 inch screwdriving bits. Magnetic bit tip holder. Packed in a convenient clear face carry case.