This 3/4"-10 internal 1-1/8"-12 external thread steel key locking thread insert is a cutting tool/insert used in industrial equipment. It provides the cutting edge used on a lathe or milling machine to remove material from a workpiece to a precise dimension. Key specifications noted on this listing include 3/4"-10, 1/8"-12. It is commonly used in CNC and manual machining and metal fabrication.
