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accurate finishes in standard machine tooling setups
Versatile 3 mm tooling compatibility: Optimized for 3 mm shanks and compatible with common small-diameter tools
The spiral flute geometry efficiently evacuates chips as you cut
If you've ever chased a misfit bolt or struggled with a stubborn hole
the AcuRea coating reduces wear and extends tool life
Carmex Carbide Threading Insert - Unified - TiAlN Coated - 21I7UN Blacksmith Drill accurate finishes in standard machineThe Carmex Carbide Threading Insert Unified TiAlN Coated (21I7UN) is a versatile threading solution designed for workshops that need reliable, high precision threads across multiple profiles. Built for machinists who value flexibility and edge life, this unified insert family reduces tool changes while delivering consistent performance on both internal and external threads. Thread profile coverage: A versatile collection of threading inserts that
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