Stripped or damaged glow plug threads in a cylinder head are a frustrating and potentially costly problem without the right tooling, repair risks further damage to the head itself. The Sealey VS311 Glow Plug Thread Repair Set provides a fast and effective remedy for damaged cylinder head glow plug threads. The 33-piece set includes tools for the precise insertion of threaded inserts, and features a unique tap guide system to ensure correct alignment throughout the repair. Four sizes of threaded adaptor are included, covering the most common glow plug sizes: M8 x 1mm, M10 x 1mm, M10 x 1.25mm, and M12 x 1.25mm. Taps are supplied in M8 x 1mm, M10 x 1mm, M10 x 1.25mm, M12 x 1mm, M12 x 1.25mm, and M14 x 1.25mm. The complete set is supplied in a storage case. Replacement inserts are available separately: VS311.01 (M8 x 1mm, pack of 5), VS311.02 (M10 x 1mm, pack of 5), VS311.03 (M10 x 1.25mm, pack of 5), and VS311.04 (M12 x 1.25mm, pack of 5). Key Features: Sealey VS311 Glow Plug Thr