Sealey 74 piece hex bit set sealey ak21974 chrome vanadium 6150 hex drive bits each size in 30 and 75mm lengths hardened and tempered for added strength set includes 3 8in and 1 2in sq drive to 10mm hex chrome vanadium steel bit adaptors supplied in storage case with inclined trays for quick and easy bit selection sealey ak21974 trx star security trx star hex spline ribe bit set 74pc