2061-SR00 machining center, thread milling shank, internal and external thread, comb shank, milling shank, lengthened single edge, double edgeSR00 machining center, thread milling shank, internal and external thread, comb shank, milling shank, lengthened single edge, double edge 1. Preferably steel, seismic and durable The overall tool is made of 42CrMo alloy steel with obvious seismic effect, which can effectively suppress vibration and improve seismic strength 2. Nickel plating treatment, anti corrosion and anti earthquake Focusing on the three major factors of corrosion, wear and