Sealey 42 piece trx star spline hex bit set 3 8 1 2 sq drive sealey premier ak21942 high quality chrome vanadium s2 steel bits hardened hrc 58 62 and tempered for added strength includes 3 8 and 1 2 sq drive to 10mm hex chrome vanadium steel bit adaptors supplied in carry case with inclined tray for quick and easy bit selection sealey ak21942 trx star spline hex bit set 42pc 3 8 1 2 sq drive