● Self-locking design, quick replacement and loosening of the screwdriver bit, no cumbersome steps, and fast ● Stainless steel has resistance and durability. The sturdy structure makes these expansion devices have a long service life ● The extension length of 60 mm is very because it makes it easier for you to manipulate the electric drive around the workpiece ● Specially designed for 2.36" hexagon shank drill bits, suitable for the transfer of electric drills, screwdrivers, drill bits, expanding various screwdriver bits and screwdriver bit conversion applications ● 60mm 2.36" hexagonal shank screwdriver handle, which can be easily used with any chuck, hand-held screwdriver or electric drill, Manufacturer: XIAOQENAN