The Sinclair TiN Expander Mandrels offer increased abrasion resistance and lubricity thanks to their Titanium Nitride coating, compared to standard steel mandrels.
These mandrels are designed to be 0.001" under bullet diameter, making them ideal for expanding necks of brass before neck turning and setting neck tension.
They are specifically made for 22 Caliber (0.223" diameter) and are a step between Stainless Steel and Carbide Mandrels in terms of performance and durability.