• Fast and effective remedy for damage to cylinder head glow plug threads.• Set includes tools for the precise insertion of threaded inserts into the head and features a unique tap guide system to ensure their correct alignment.• Includes four sizes of threaded adaptors suitable for common sizes of glow plug.• Supplied in storage case.Fast and effective remedy for damage to cylinder head glow plug threads. Set includes tools for the precise insertion of threaded inserts into the head, and features a unique tap guide system to ensure their correct alignment. Includes four sizes of threaded adaptors suitable for common sizes of glow plug. Supplied in storage case.• Fast and effective remedy for damage to cylinder head glow plug threads. • Set includes tools for the precise insertion of threaded inserts into the head and features a unique tap guide system to ensure their correct alignment. • Includes four sizes of threaded adaptors suitable for common sizes of glow plug. • Supplied in sto