Product Features Theres 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. Features The micrometer adjustment gives positive reference for metering adjustments. Install pre-set metering units by simply pushing the button on the outside of the metering chamber. Measurements adjust from 20 to 65 grains. All moving parts have been plated for protection and long life. The rotor requires NO lubrication.