... :zinc plated or others 3)Customized designed "L-model" Hex key wrench 5 mm "L-model", 31 mm x 75 mm, zincplated, harden HRC 52 ... +5/-1045#carbon steel NameHex key wrenchWeight Item NO.SX-B6XX-01Size31mm*75mmMaterial5 mm "L-model ... ", 31 mm x 75 mm, zincplated, harden HRC 52 +5/-1045#carbon ...