1) The long-lasting choice for cutting holes in materials too hard or abrasive for standard bi-metal hole saw,

       or so thin they would strip bi-metal or chip carbide teeth,ideal for cutting ceramics,

        fiberglass,hardwoods,cast iron,composites,etc.

2) super resistance to heat ,wear and abrasion with shock resistant back

3) tungsten carbide grains are bonded to alloy backs with a gulleted,snag resistant edge.

4)cutting depth :38mm(1-1/2")

5)size can be from 3/4" till 6" or 19mm till 152mm