RCBS Single Stage shell holders are built from hardened steel, providing long-lasting durability and performance. Designed to properly align the case with the reloading die, these shell holders ensure that the reloading process is smooth and efficient. RCBS Single Stage shell holders are designed to properly align the case with the reloading die in single-stage and turret presses. Theyre sized to fit specific case heads and capture 0.125 inch of the case head for proper SAAMI headspacing. RCBS shell holders are built for Single Stage and Turrets Presses. RCBS shell holders are manufactured to exacting tolerances. RCBS shell holders are hardened for years of use. RCBS shell holders ensure proper alignment between the cartridge and die. The Shell holders are cut to .125 depth for proper headspacing.