Standard Size: Compatible with model P1300-part-13-key fits both 3/8-inch and 5/16-inch hydrant/water supply shut-off valves total length of 3.23 inches. Versatile Use: Suitable for operating wall-mounted water hydrants, faucets, valves, and outdoor hose valves. Durable Construction: Made from high-quality stainless steel offering excellent hardness and toughness features a corrosion- and rust-resistant finish for a longer service life. Easy to Use: Extended handle design facilitates insertion and operation, providing ample clearance. Portable Design: Compact and lightweight can be attached to a keychain. Weight: 0.242 lbs.