Stanley® Proto® 8-Piece Long Folding Hex Key Set has a 5 1/4" case that is made of chrome-plated steel for added durability. Set contains 4" long black oxide bits and 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32" as well as 1/4" hex keys.
Features
Made using a heat treated alloy for wear-resistance which helps minimize distortion for a long life.
Hex opening holds the bit allowing the bit holder to take the torque load.
