ER M Spanner ● Made of 45# steel.●Accurate occlusion, more efficient use.●High surface hardness, and high wear resistance.
ER A Spanner ● Made of 45# steel.●Accurate occlusion, more efficient use.●High surface hardness, and high wear resistance.
ER UM Spanner ● Made of 45# steel.●Accurate occlusion, more efficient use.●High surface hardness, and high wear resistance.
ER C Spanner ● Using 45 steel● Accurate occlusion improves efficiency● Adopt the first carburizing and then quenching process● High surface hardness and high wear resistance