Southwire Tools & Equipment HEX-5 5-Piece Steel Body Folding Hex Key Allen Wrench Set, 3/16" to 3/8" Convenient and reliable, this folding hex-key set will help you get the job done quickly and easily. Precision made hex keys reduce slipping and stripping. Set easily stores in metal case to reduce lost keys and damage. Chrome-plated stainless steel shaft allows for maximum torque with minimal shaft twisting. Handle end is marked for easy identification of tip type and size.