Hex-Key Sets Five-key inch set: 3/16”, 7/32”, 1/4”, 5/16”, 3/8” - Our Pocket Hex Key Sets are durable for added leverage.Hex-Key Sets Five-key inch set: 3/16”, 7/32”, 1/4”, 5/16”, 3/8” features include: Pocket Hex Key Sets fit your pocket or tool box easily Keys fold into handle to help eliminate the lost key problem Keys are tough, heat-treated Alloy Steel for strength and durability Can be used straight out or at an angle for extra leverage Durable steel case doubles as a handle Dimension Measurements = Inches and (Millimeters) Order Qty of 1 = 1 Piece Below is more info on our Hex-Key Sets Five-key inch set: 3/16”, 7/32”, 1/4”, 5/16”, 3/8”