Damage free thread repair kit for 1‑1/4in‑5in external threads1、Function: Replaces OTC 7402 and 202817 metric modules. Instantly save, repair and restore broken threads. Quickly restore threads to near original condition. 2、Convenient Using: From 1‑1/4 inch to 5 inch OD, just tighten the tool slightly on the good threads, then back off over the damaged thread area to restore the threads. 3、Durable Materials: The outside thread chaser is made of superior CNC machined aircraft grade billet aluminum with silver anodized finish, good rigidity and durability, high accuracy and hardness. 4、Complete Kit: Comes with 9 pieces parts, including replaceable V pads and dies. Complete with 6pcs No.216884 Standard dies threads per inch, 4 5 6 7 7‑1/2 8 9 10 11 11‑1/2 12 14 16 18 20 and 24. 5、High Performance: Operate without without the use of expensive thread cutting equipment. The die cast alloy V pads will not damage the threads. V pads and dies can be replaced when worn out.