1.The cutting edge part selects M42 high speed tool steel. The belt part is the alloy tool steel which has high intensity and good toughness. The part of cutter body adopts the plain carbon steel. All of the connection parts adopt the most advanced electrons leaves welding. It is rational design and perfect in workmanship, especially cut the edge out of the common. It can be used to open hole in ferrous metal, nonferrous metals and macromolecules materials of every trade marke. It is used extensively in these trades such as aviation, vessel, automobiles, electrical appliance, petrochemical industry, ornamental, kitchen ware, etc..

It has better heat resistance, especially suitable for opening hole with all kinds of metal sheets. when you cutting the hard metal, you should look at temperture of the part of cutting edge, annotate the cool liquid.