Hornady Lock-N-Load Bench Rest Grade Powder Measure - You'll receive all the advantages of Lock-N-Load technology with the added benefit of more precise measuring. That precision comes from a specially designed chrome-plated metering insert and a smaller metering chamber to promote more consistent and uniform filling. 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. Install Pre-Set Metering Units By Simply Pushing The Button On The Outside Of The Metering Chamber The Micrometer Adjustment Gives Positive Reference For Metering Adjustments All Moving Parts Have Been Plated For Protection And Long Life Measurements Adjust From 20 To 65 Grains The Rotor Requires No Lubrication