Hornady’s Bench Rest Powder Measure gives you all the advantages of Lock-N-Load technology with the added benefit of more precise measuring. That precision comes from a specially designed metering insert and a smaller metering chamber to promote more consistent and uniform filling. The micrometer adjustment gives positive reference for metering adjustments and you can install pre-set metering units by simply pushing the button on the outside of the metering chamber. There’s no need to drain your powder hopper or disassemble the Powder Measure. Simply use the Drain Tube Insert (sold separately) to rapidly and easily return powder to its container. All moving parts have been plated for protection and long life, and the rotor requires NO lubrication.