1.Sharper teeth, high penetration 2.M42 bimetal material, long service life 3.Better chips clearance 4.High precise drilling Bimetal Hole Saw isdesigned to cut accurate holes in various kinds of materials, such as ordinarysteel, cast iron pipe, steel plate, aluminum, copper, brass, stainless steel,rough wood, plywood plastics, etc. The maximum cutting depth is up to 35mm (1-3/8''), and the ...