Faithfull FAISBMBNUT13 Magnetic Hex Nut Driver 1/4in Hex 13.0mm These Faithfull Magnetic Hex Nut Drivers are manufactured from a high-grade steel with a magnetic hex socket. Ideal for repetitive jobs requiring the setting and removal of bolts and nuts. The 8mm is commonly used for driving self-drilling screws (Tex Screws). 1 x Faithfull Magnetic Hex Nut Driver 1/4in Hex 13mm