RCBS revolutionized reloading for straight-wall rifle and pistol cartridges with its 3-Die Set, offering precise sizing, expansion and seating in one complete package. The Carbide Sizer Die eliminates the need for lubrication while resizing and depriming. The Expander Die flares the case mouth for proper bullet alignment and the Seater Die finishes the process by seating and taper crimping the bullet securely. Ideal for reloaders seeking consistent results with straight-wall brass. Carbide size die eliminates the need to lubricate cases before sizing Expander die precisely flares cases for easier bullet seating The taper crimp seat die ensures proper cartridge headspacing and secure bullet seating Packaged in a signature green box for easy recognition RCBS dies are machined with precision and hardened to the highest industry standards Proudly made in the USA for superior quality and reliability