Lisle Extractor #4 - 62040 is a double-ended extractor designed to remove broken spark plugs, broken glow plugs and other stuck parts. It features a left-hand spiral extractor and a right-hand spiral extractor, both with a 1/2 square drive for use with a ratchet or breaker bar. It also includes a 1/2 hex drive adapter for use with a socket wrench.