The flexible shaft can be bent up to 300 degrees. Suitable for hex screwdrivers or cordless drills, shaft diameter: 6.35 mm (1/4 inch). Bits and bit holders hold screws securely while driving. Flexible, the guard protects your hand while the shaft rotates. Bends, twists, and drills for use in tight and confined spaces. Can be used for hand or electric drills with sockets. Mainly used in computer cases, control cabinets, furniture, electrical appliances, and other confined environments where screwdrivers may not work. Metal materials, durable and portable, flexible, protective shield protects your hand while the shaft rotates. Flexible protective shield protects your hand while the inner shaft rotates. Description: This flexible shaft can be used for ordinary cordless drills, it can also be used for electric screwdrivers. Flexible shaft heads can be mounted on screwdriver bits with a hexagon shank (1/4 inch shank) and are mainly used in computer cases, electrical cabinets, furniture,