Homax 00040 Taping Knife, Three-Edge Blade, Polystyrene Blade, Yellow Handle               Homax triple edge drywall knife is a 3-blade drywall knife, wall paper smoother and paint shield. constructed of heavy-duty, high-impact polystyrene, Homax triple edge drywall knife is both flexible and lightweight. it's easy to use and comfortable to hold in your hand.