Specification: Color: Black Material: Alloy Steel Function: It can be connected to an electric drill, rechargeable drill or manual wrench, and it can be stretched into a small space that they cannot reach, and then screw in the screw. Features: Suitable for all drill bits and socket wrenches. The functional head has a magnetic device and can be connected to a standard 1/4 hex head. Feature: 1. Simple, lightweight, fast, connects to a standard hex screwdriver. 2. Durable and durable. 3. It is suitable for wrenches and can be connected to electric drills, rechargeable drills or manual wrenches. 4. Suitable: 1/4 hex screwdriver