*All products are high quality and authorized.
*The material:S2 high alloy steel,8860 alloy steel(high torque).
*Application:65 CR.V.MO.(S2)–wood,wall etc,such as low hardness; 8860 alloy steel–high torque,high hardness of steel products.
*Using German DIN standard,the head tolerance less +/-0.05mm.
*Packing:assorted bit driver packing.
*It obtain the high hardness and high torque to be more durable after overall quenching,wear resistance.