The Frankford Arsenal bench mounted Powder Measure features a static free aluminum body, a unique hopper shape to eliminate powder bridging and binding, micro-adjustable dispensing, and ultra smooth ball bearing operation which all combine to maximize powder dispensing accuracy. The powder measure comes ready to install with a bench mounting plate. FEATURES: Static Free Aluminum Body Compatible With .22 - .50 Cal No Binding Or Bridging Of Powder Micro Adjustable Dispensing Handgun Powder Drum Available Bench Mount Plate Powder Drum Rides In Ball Bearings For Smooth Operation