Features: It became fabricated from High Strength S2 Alloy Steel,Very Durable Suitable for set up in pneumatic screwdrivers,electric screwdriver,rechargeable drill,using the wind batch Titanium lined electrical screwdriver is nice and durable Condition : one hundred pc Brand New and High Quality Specifications: Material : S2 Alloy Steel Size : 25mm/50mm Weight : 55/45 Shank : 1/4" Hex Shank ( 6 ) Type : Cross Head Package List : 5pcs/set Electric Screwdriver Bit 10pcs/set Electric Screwdriver Bit Notes : 1 ) : Plz enable 1 ~ 3 mm error because of the guide measurement 2 ) : Due to the several show & light,The photograph might not show precise shade of the item,Thanks to your realizing PICTURE SHOW