The Sinclair TiN Expander Mandrels offer increased lubricity and abrasion resistance due to their Titanium Nitride coating, compared to standard steel mandrels.
These mandrels are designed to be 0.001" under bullet diameter for precise neck expansion, suitable for .338 Caliber (0.337" diameter) brass preparation before neck turning.
While providing a more durable option than stainless steel, the TiN Expander Mandrels are a cost-effective alternative to upgrading to Carbide Mandrels.