Lee's Pro Auto Disk Powder Measure has Elastomer wiper and teflon coated metal casting which makes this the smoothest operating measure. It will not cut powder and almost totally eliminates leakage. The large hopper with shut-off valve is attached with brass thumb nuts for the ultimate in disk changing convenience and holds 1/2 pound of powder. Included is a swivel adapter and spring return lever with spring and all four disks, and a positive pull-back lever.