Case preparation is a vital part of reloading metallic cartridges, and this tool will improve the consistency and quality of your bullet seating. Its engineered for use on the RCBS Trim Mate Case-Prep Center and quickly removes burrs on the inside of the case mouth after trimming. Carbide construction means youll never need to resharpen it. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: De-burring/Chamfering.