Suitable for cleaning corrosion and carbon build-up from spark plug threads. Also possible to restore minor cross threading damage. Use with a 21mm spark plug socket.14 & 18mm Spark Plug Thread Chaser• Suitable for cleaning corrosion and carbon build-up from spark plug threads.• Also possible to restore minor cross threading damage.• Use with a spark plug socket (21mm).• Model No. VS525Model No: VS525:Brand: Sealey:Maximum Drive Diameter: Ø21mm:Nett Weight: 0.14kg:Size(s): 14PTDSEAVS525
