uxcell Magnetic 4mm Tip 6.3mm Shank Diameter Hex Bits 10 Pcs UXCELL (U excel !) is the sole authorized Seller of uxcell products Product Name : Screwdriver Bit;Hex Tip Width : 4mm/ 0.157";Shank Size : 6.3mm/ 1/4" Each One Length : 50mm/ 1.96";Color : Gray Material : Metal;Total Weight : 107g Package Content : 10 x Screwdriver Bits