ITEM NAME:60mm 1/4" Hex Shank Quick Release Drill Screw Magnetic Screwdriver Bit Holder OZ 100% brand new and high quality Interface has a locking mechanism, built-have magnetic, automatically pop up batch head. Suitable for drill, screwdriver, batch head and other to transfer. Extend all kinds of screwdriver bits, screwdriver head conversion uses. Fast, fastening; Greatly improve work efficiency. Specifications: 1/4" hex shank (6.35mm) Length: 60mm Color: Black+Silver.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).