Uxcell a13061700ux0331 10 Pcs Hexagon 6.35mm Shank 2mm Tip Hex Screwdriver Insert Bits Product Name : Screwdriver Bit; Features : Hex Head, Hex Shank; Material : Metal Opposite Dudes Distance of Tip : 2mm/0.78";Hex Shank Width : 6.35mm/ 1/4" Total Length : Total Length;50mm/2'' : 50mm/2''