The body and the blade is made of HSS steel. Fashionable design can make smooth hole save both time and labour. With special heat treatment sharp edge high strength; Blade tooth computers dividing high-speed grinding device; With high precision stable cutting resistance to impact good abrasion resistance. Excellent cutting black non-ferrous metal can also be processed under 2 mm stainless steel plate. Can cutting on uneven artifacts such as all kinds of openings in the pipeline. When cutting cold hard material the blade temperature filling should see ling but fluid.