The Quick-Change Lower Shell Holder Jaws offer exceptional convenience and efficiency for reloaders. Designed to securely support cases during the reloading process, these spring-loaded jaws contact the base of the cannelure, ensuring more positive extraction. The self-acting design streamlines operation when a cartridge is placed in the die and the handle of the Co-Ax Press is activated, the jaws automatically open and close around the case. Once the handle is raised, the jaws release the case effortlessly. Switching between different case sizes is simple with the Quick-Change Jaws. By removing the 10-24 x 5/8 inches Button Head Screws (028271-020), you can easily replace the jaws without needing to disassemble or reconfigure the Shell Holder Jaws. This efficient design eliminates the need to flip sides, spring-load the jaws or perform any complex adjustments, making case changes quicker and more convenient than ever. These innovative features make the Quick-Change Lower Shell Holder Jaws an indispensable upgrade for any reloading bench.