M14x1.25 spark plug repair short tooling: Normally used on vehicles that the spark plug is near the surface. Examples would be small engine repair as in mopeds, lawn mowers, out board motors and some motorcycles. These applications would not require long reach tools. The 4412 kit is used for both washer and taper seat applications. The installation is exactly the same for taper seat or washer seat you only need the appropriate length/style of insert. THIS KIT CONTAINS NO INSERTS; MUST BUY SEPARATELY