2Precision Giant Metric inserts are available in both locking and free-running varieties. These inserts are available in several different lengths. The standard material for these inserts is 18-8 stainless steel, but they are also available in Inconel X750. These inserts can also be plated in Dry-Film Lube or  Silver. Our inserts are DFARS compliant, and conform to military or aerospace specifications when applicable.