1.Name: M42 Bimetal Hole Opener 2.Handle diameter (mm):10mm 3.Chip channels length (mm):25mm 4.useful length (mm):35mm 5.Total length (mm):70mm 6.Outer vertex(°):45° 7.Cooling type (internal and external cooling): external cooling 8.Used: cast iron, aluminum alloy and other metals as well as wood, gypsum, plastic and other materials.
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