The Tovolo Precision Pie Crust Fluted Pastry Cutter Wheel works like a compass to cut a perfectly round crust. A center knob stays in place while the arm rotates and the pastry wheel traces a clean circle around it. A ruler engraved into the white arm and a sliding guide that locks in place let you size the crust to your dish, for baking dishes from 2 to 14 inches. Four wheel designs, straight, scalloped, tight wave and loose wave, let you change the edge for each pie, and the spare wheels store inside the charcoal center knob. The fluted wheel crimps and seals the edge in the same pass, which helps it hold its shape during baking. The same wheel cuts even lattice strips for a woven top. Made from BPA-free, food-safe nylon, the cutter is dishwasher safe.