A: Substance: The sort of fabric you will end up cutting will determine the type of hole saw you will need. By way of example, Should you be slicing Wooden, you will require a bi-metallic hole observed. When you are chopping metallic, you may need a tungsten carbide hole saw. https://wholesaleholesaws93714.free-blogz.com/82698294/hss-hole-saw-no-further-a-mystery