TEKTON 25151 Folding Hex Key Wrench Set, Inch, 9-Piece [Older Model] Chrome vanadium steel wrenches are heat treated and black-oxide finished Precisely-sized, chamfered ends insert smoothly into fastener head, reducing wear Contoured shape, with rounded profile and soft, textured grips, comfortably fits in your pocket and your palm Color-coded housing for instant identification and high visibility size markings for fast wrench selection 9-pc. Hex key wrenches (SAE): 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4 in.