Crown Set of Thread Chasers, 12 TPI is an essential toolset designed for creating precise threads on lidded boxes, vessels, and various containers, enhancing both their security and aesthetic appeal with a screw-on feature. This set includes one chaser for the interior of the lid and another for the exterior of the vessel, allowing for a fit and smooth operation. The tools feature stained Beech handles for a comfortable grip and have an overall length of approximately 17 inches. Additionally, the set comes with the informative booklet "Practical Screw Cutting" by turner Bill Jones, providing valuable guidance for users. Crafted in England, this set combines quality craftsmanship with practical functionality to meet your threading needs. Model Number: TC12