1) The long-lasting choice for cutting holes in materials too hard or abrasive for standard bi-metal hole saws,
or so thin they would strip bi-metal or chip carbide teeth,ideal for cutting ceramics,
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