EZ HOLE Professional Hole Saw Cutter with Full FULL LIFETIME WARRANTY - The last hole cutter you'll ever need to buy. CUTS HOLES WITH EASE - Ideal for plywood, drywall, plaster, etc. *Not for wood siding or uneven surfaces. HEAVY DUTY - Carbide cutting blade, all metal jig, sealed ball bearings, and an ABS dust shield COSTS LESS - This kit can replace an entire hole saw set from 1-3/16" to 8-5/8" for much less REPLACEABLE BLADE & BIT - Inexpensive tungsten carbide replacement blades and pilot bits readily available