The material of the bimetal hole saw is heat-treated M42 bimetal saw band with sharp tooth shape, durability and good stability. The processing materials range from thin metal to wood, plastic, PVC, etc. The hole saw requires just one pass to cut dowels; these hole saws are ideal for jobs where high performance and precision are required. Excellent for cutting wood, plastic, machinable metal, nail-embedded wood, plywood, pipe and steel. The high-speed steel cutting edge of the hole saws provides impact-resistant teeth and resists tooth stripping. The soft spring steel creates a flexible backing material that allows the hole saw to absorb the impacts of drilling holes in hard-to-cut materials. on the concentric degree, so that the edge of the teeth is uniform, to extend the life of the hole Cuts faster, smoother without as much vibration as others because of its variable pitch teeth; Creates holes for pipe and tube installations, door lock installations, electrical conduit, hoses and