Gray Tools Hex Key Set, Measurement System: Imperial, 5 Piece, Hex Drive, 3/16 to 3/8 in Hex, Foldable Handle, S2 Steel

• Made of premium S2 steel delivering superior durability and corrosion resistance
• Premium S2 steel also results in a hex key that delivers up to 33% more torque than ordinary keys
• Each keys size and part number is permanent etched making finding the right size faster and more convenient