Product Description Manufactured from quality materials for superior performance, the Milwaukee 55-Piece Drill/Driver Set is the perfect addition to any toolbox or jobsite. The handy set includes: (5) Thunderbolt black oxide drill bits in 9/64, 5/32, 3/16, 7/32 and 1/4 inches. The 1” insert bits are: Phillips P1 (2), P2 (16) and P3 (2); straight SL5 (6), SL6 (8), SL8 (10) and SL10 (12); square SQ1 (5), SQ2 (5) and SQ3 (2); (1) each of Torn T10, T15, T20, T25, T27 and T30 bits; (1) each of hex bits size 6/64, 3/32, 7/64, 1/8 and 9/64; 2” power bits are (1) each of Phillips P2 , P3, straight SL810 and square SQ2 bits; 3” power bits are (1) each of Phillips P2 and square SQ2 bits; magnetic drive guide. From the Manufacturer The Milwaukee Quik-Lok Bit system allows users to change drilling and driving accessories quickly and easily. The patented all-hex chuck feature will accept and hold all 3/8-in and 1/2-in hex shank accessories including double-ended bits. The kit is an ideal choice for professional contractors with the need to frequently and quickly change bits. Other system features include titanium drill bits for long life and superior performance, screwdriver bits made from premium quality S2 steel for high torque applications, and a convenient storage case.