Cuts Round Holes From 6 1 and 4" - 10 3 and 8" In Drywall & Ceiling Tile With No Mess When Using The Clear Flexible Dust Shieldfits A 3 and 8" & 1 and 2" Drill Chuck & Can Be Used With Cordless Drills Self-sharpening Carbide-coated Cutting Blades For Long Life Drill Not Included