High-quality adapter sockets: Each adapter is made of heat-treated chrome-vanadium steel and is coated with manganese phosphate to resist rust and corrosion and ensure long life. Wide Application: Suitable for quickly changing 1/4 inch chuck systems or directly into drill chucks. Each cordless drill in an electric groove driver. Convenient for quickly driving nuts, screws and fasteners etc. Spring-loaded ball bearing on the head holds sockets firmly. Compatibility: Suitable for screwdrivers or power drills, features 1/4" quick change chuck systems or directly into drill chucks. Change your hand tool socket sets to impact/drive sockets. Specifications: 3pcs 1/4" drive adapter, 3/8" drive adapter and 1/2" drive adapter and each with a set of 1/4 inch hex screwdriver socket wrench adapters. So you can turn any drill into an electric screwdriver with the added reach. Specifications: 3pcs 1/4" drive adapter, 3/8" drive adapter and 1/2" drive adapter and each with a set of 1/4 inch hex screwdriver socket wrench adapters. So , you can turn any drill into a power screwdriver with the added reach.