Features:

•  Self sharpening hole saw for long time use
•  Will cut through ceramic, plastic, fiberboard, fiberglass, concrete bock, and plywood
•  A must have too for cutting standard faucet and shower head pipe holes in tile.
•  Fit on Drill: 500rpm, Driver depth: 55mm 
•  Included Locating Plate pilot drill File: 10" (250mm)
•  5 Hole-Saws: (1-1/4", 2-1/8", 2-5/8", 2-7/8", 3-1/4")