529 Magnetic 21mm spark plug socket, 3/8" drive

Changing plugs on a vintage Panhead, Shovelhead, or Ironhead Sportster requires a tool that can handle deep reach and provide a secure grip. This 21mm spark plug socket from Lang Tools is designed for 3/8" drive ratchets and is specifically sized for most 14mm threaded spark plugs. It features an internal magnet that firmly holds the plug in place, which is a lifesaver when you are trying to thread a plug into a deep cylinder head cavity without cross-threading it. This socket fits 1948–1999 Big Twin models (excluding Twin Cams) and 1957–1985 XL Sportsters. It is a professional-grade tool that ensures you won't drop or crack a porcelain insulator during your next tune-up.