10-piece set of 4-way multi-functional keys. Each key features both Phillips and flathead screwdriver bits and includes four different socket shapes: triangular, square, and round. Suitable for a wide range of applications, including trains, automobiles, elevators, subways, and control cabinets. Measuring 2.8 x 2.8 x 0.5 inches, each key comes with a bead chain for easy portability. Made from electroplated zinc alloy, they are sturdy and durable. Easy to use, making them an ideal choice for home Diy projects and outdoor use. Weight: 1.45 lbs.