Designed to increase the load rate of your progressive press by 50%. Designed for the RCBS Pro2000 and Pro2000 Auto. Will work on most progressive presses that accept 7/8"-14 threads including the Dillon RL550B, XL650 and Hornady LNL AP. Kit includes everything to load 9mm, .38 Spl, .357 Mag, .40 S&W, 10mm and .45 ACP jacketed, FMJ or TMJ bullets. NOT FOR USE WITH CAST OR SWAGED LEAD BULLETS. Adjustable height Hopper holds 150-200 bullets depending on bullet weight and caliber. DC operation, four country changeable plug 120-240 VAC power supply.