Redding's Titanium Nitride Neck Bushings are heat treated steel bushings with an additional Titanium Nitride coating to increase surface hardness and reduce friction.
The bushings are available in a range from .185" through .368" in .001" increments, with the product number reflecting the bushing size.
This particular bushing has a diameter of .274 inches, suitable for specific neck sizing needs in reloading.