Head Lite Glow Plug Igniters fit all standard glow plugs. They have high quality Stainless Steel Bodies welded to Stainless Steel Tubes, a replaceable quality NiCad battery and use the Twist-Lock connection design. Designed for years of use, these rugged glow plug igniters can be charged by the M023 charger or any other 1.2V NiCad glow plug igniter charger. They work very well with Head Lock Remotes.