The Black Diamond SAE Hex Key Set gives you the inch sizes you need for common hex fasteners in tools, equipment, and hardware. This 13-piece set includes 0.05, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, and 3/8 to cover a wide working range. A practical set for the shop, garage, or jobsite when you want quick access to the right SAE key.