Sinclair 17 Caliber (.171") Titanium Coated Expander Mandrel
Part #749-019-000

The Sinclair TiN Expander Mandrels are a great option for those who want increased resistance to abrasion over Stainless Steel Mandrels, but don't want to feel the need to upgrade to Carbide Mandrels. The Titanium Nitride coating process adds increased lubricity and abrasion resistance over the standard steel mandrels. Expander mandrels are made to 0.001" under bullet diameter. Originally designed to be used to expand the necks of brass prior to neck turning, these Mandrels can be used to set neck tension.