Impact sockets are made of chrome vanadium steel. These socket adapters each have an improved hardness, rust and rust resistant die-cast body, each with a ball bearing. Simple to use screwdrivers, perfect handy tool for hard to reach corners and tight spaces, maximum torque 77N.m. This adapter set is designed to provide a securely locked extension to your existing tool. The socket socket adapter kit includes 3 pieces of 1/4 - 65mm, 3/8 - 65mm and 1/2 - 73mm. Suitable for screwdriver or electric drill or screwdriver handle tools, with hex holes or three-jaw chuck, they can be connected to the drill, rechargeable drill or manual wrench, extending their reach to inaccessible stenosis, bent screws, a nut andmore. Suitable for screwdriver or electric drill or screwdriver handle tools, with hex holes or three-jaw chuck, they can be connected to the drill, rechargeable drill or manual wrench, extending their reach to inaccessible stenosis, bent screws, a nut and more.