The Snap-on 13-pc Multispline Screw Extractor Set is designed to remove damaged or broken screws. The American-made set is compatible with wrenches, ratchets, and pliers, and its compact design eases application in tight spaces. Made from special alloy steel, the set provides additional strength and long-lasting thread life. The left-hand threads provide superior gripping power. Each extractor is stamped with markings for easy identification.