Hornady New Dimension Series I Two Die Rifle Set .223 Remington Caliber - 546228. Zip Spindle design provides precise fit by aligning the spindle perfectly with the center of the die to eliminate slippage. Wrench flats on Sure-Loc lock rings. Headed steel decapping pin. Elliptical expander polished to smooth finish. All-steel seater adjustment screw. Compression washer holds setting once in place. Retainer ring removes easily. Sliding alignment sleeve. Built-in crimper.