ITEM NAME:60mm 1/4" Hex Shank Quick Release Drill Screw Magnetic Screwdriver Bit Holder LJ #aucsearchbutton #aucsearchbutton:hover { cursor: pointer;.Extend all kinds of screwdriver bits, screwdriver head conversion uses. Length: 60mm. Suitable for drill, screwdriver, batch head and other to transfer. Specifications: 1/4" hex shank (6.35mm).