• The surface of the screw head is held on by an additional ultra strong, powerful rare earth magnet allowing for vertical or horizontal screwing without slippage. • Allows precision screwing with a single hand operation, saving time. • The in-built spring allows for countersinking. • Suitable for use with all 25mm driver bits. The bits retract within the mechanism allowing the screw to magnetically attach to the end of the holder. • Suitable for use with all standard 1/4" insert bits.