The Lee Auto-Drum Powder Measure is an automatic case actuated drum powder measure. Accurately and automatically dispense powder in your favorite cartridge. Two infinitely adjustable drums included. These Quick Change drums will accurately and reliably drop charges from 1 to 80 grains of powder. Case actuated so you never spill a charge. Exclusive elastomer wiper prevents powder shearing, works great with difficult metering extruded powders. Machined body with labyrinth groove mates to the precision moulded nylon drums providing a leak free fit with the finest powders. Drum is actuated by a steel sector and pinion gear train. Quick-change hopper has on/off valve to quickly change powders. Sleek modern design, all gears springs and levers inside the die cast housing.