Unlike putty knives or any of the flat pieces and parts you might use to mix and apply common body fillers, caulks and glazes, our Bondo Spreader is designed specifically for automotive aftermarket applications. Each pack contains 3 different spreader sizes, virtually ensuring you get the spreader that's most comfortable and effective for the specific job. Made from durable plastic, each spreader is strong enough to last yet flexible, giving you all the leverage you need to work effectively across flat or curved surfaces. And each spreader features a thin, clean edge that makes it faster and easier to shape filler, putty, glaze, spackle or caulk just the way you want it.