The Hornady Lock-N-Load Micrometer Rifle Powder Measure is just the tool you need to dramatically improve the function of your favorite Hornady Lock-n-Load Powder Measure. This tool gives you the ability to make incredibly small adjustments thanks to the micrometer adjustment dial. The Hornady Lock-N-Load Micrometer Rifle Powder Measure can reload and throw rifle powder charges from 10 to 100 grains all depending on which type of powder you use. As an added bonus you can quickly swap this unit into and out of your Hornady Lock-n-Load Powder Measure with the mere touch of a button.