Travers Tool offers an extensive range of dies for threading and rethreading of bruised or damaged threads on screws and bolts. Sizes available include all standard national course (NC), national fine (NF), special thread for inch and metrics.Travers also offers a wide range of pipe thread dies for NPT and NPS threads. Styles include round adjustable, hexagon, right hand, left hand, NPT & NPS pipe & metric. Travers sells dies from TMX, Viking & other brands. Individual sizes and sets in wood or plastic cases are available.