Professional tool for commercial or occasional use -Thread repair kit for glow plug M8 x 1.0 -Fast and effective remedy for damage to cylinder head glow plug threads -Unique assortment for the repair of worn or damaged threads Provides absolute firm and gas density seat for many uses -Fast repair possibility no costly replacement of bearing housing and components -This kit ensures a straight thread and the new insert provides an efficient fit -Essential kit that solves common problems on diesel engine alloy cylinder heads. -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. -Essential tool for alloy cylinder heads -Simple handling and correct repair ensured every time SET INCLUDES THE FOLOWING - Tap and coil insert for repairing M8 x 1.0 Glow plug threads - 5 x 10mm M8 inserts -Come in a wooden box for easy storage and transportation.