KLEIN TOOLS' 70575 Grip-It hex-set. 9 in sizes; 0.050 in (1 mm), 1/16 in (2 mm), 5/64 in (2 mm), 3/32 in (2 mm), 7/64 in (3 mm), 1/8 in (3 mm), 9/64 in (4 mm), 5/32 in (4 mm), 3/16 in (5 mm). Hex-key ends are square-cut for a secure full-depth fit and maximum contact with the hex socket to prevent slippage and stripping of the socket. Tough, heat-treated alloy steel.