The Sinclair TiN Expander Mandrels provide increased abrasion resistance and lubricity compared to standard steel mandrels due to their Titanium Nitride coating.
These mandrels are designed to be 0.001" under bullet diameter, making them suitable for expanding the necks of brass prior to neck turning and setting neck tension.
The 6.5mm (0.263") TiN Expander Mandrel is positioned as a mid-tier option, offering a durable upgrade from stainless steel without the need to invest in carbide mandrels.