Sealey 8 piece glow plug reamer base cleaning set sealey vs312 quickly removes accumulations of carbon residue inside the cylinder head assisting the installation and effective operation of replacement glow plugs includes four ream guides which aid the centralisation of the chrome vanadium reams suitable for m8 m10 and m12 threaded glow plugs supplied in storage case sealey vs312 glow plug reamer base cleaning set 8pc