The Lock-N-Load Powder Measure is the only system that uses a full size powder measure that can change powders and settings with the push of a button. The Hornady Powder Measure has the widest measuring range of any powder measure on the market and unique inserts in the measure that can be preset to the charge you use with the caliber you are loading. Inserts can be adjusted for almost any charge and push button release which allows quick change of the metering inserts. Includes an 8 inch hopper, standard metering insert (5 to 100 grains), two aluminum drop tubes which cover .22 to .45 caliber, and a flat mounting bracket with a split lock ring. Weight: 3.55 lbs.