Hex Bit Adapter 5PCS Magnetic Holder Converts 6 35mm to 4mm Socket Set of 5
5pcs Screwdriver adapter. New 6.35mm 1/4" Insert Bit adapter to 4mm 4 Screwdriver Bit Adapter Magnetic Holder. Or your screwdriver handle holder size is 1/4”/6.35mm and you want to use 4mm bits to work.