Kobalt - DTC-21040 - Drill and Drive Set Kobalt 40-piece set of drill/driver bits is ideal for your toolbox Includes 2 magnetic nut drivers (1/4-in and 5/16-in), 16 S2 steel 1-in driver bits, 14 S2 steel 2-in driver bits, 7 HSS hex shank drill bits (two 1/16-in, one 3/32-in, one 1/8-in, one 5/32-in, 3/16 in, one 1/4-in), and 1 magnetic bit holder Black oxide coating is durable