Manufactured from chrome vanadium 6150 steel long and short ribe spline hex trx star and security trx star bits set includes 38 and 12sq drive to 10mm hex chrome vanadium steel bit adaptors contents ribe bits m5 m6 m7 m8 m9 m10 m12 m14 1 each 30 75mm spline bits m5 m6 m8 m10 m12 1 each 30 75mm hex bits 4 5 6 7 8 10 12mm 1 each 30 75mm trx star bits t20 t25 t30 t40 t45 t50 t55 t60 1 each 30 75mm security trx star bits t20h t25h t30