Century Drill & Tool 92932 Fractional Right Hand Rethreading Die Set, 7

For repairing damaged threads on bolts or studs. Will not crosscut or undercut the thread the way a cutting die would. Do not use on hardened threads or to cut new threads. Made of high carbon alloy steel for a long tool life.

• Restore Damaged Fine Threads with Ease: Specifically designed to repair worn or damaged fine threads on bolts and studs, making this set a must-have for mechanics, maintenance techs, and DIYers.
• Non-Cutting Design Preserves Thread Structure: Unlike traditional cutting dies, these tools reform threads without cutting or weakening them—preventing crosscutting or undercutting of existing material.
• Not Intended for Cutting New Threads: Use only for rethreading non-hardened fasteners; not recommended for hardened threads or for initiating new thread patterns.
• Durable High Carbon Alloy Steel Construction: Built from tough, high carbon alloy steel for strength and long-lasting performance across repeated uses in harsh environments.
• Includes 7 Popular NF Sizes: Set contains 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", and 5/8" fine-thread (National Fine) hex rethreading dies to tackle a wide range of fractional repair jobs.