The Lee Deluxe Perfect Powder Measure features a high pressure die cast diamond-machined body. The precision-machined rotor drum is cast from brass, which is naturally antistatic and spark proof. Eliminates Cut Powder and Jerky Action A soft elastomer wiper strikes off the metering chamber rather than cut the powder. You’ll be surprised at how smoothly the rotor operates. More importantly, you will enjoy the most uniform of charges. Easy to Set and Read Micrometer Metering Chamber Powder charge adjustment is accomplished with a true micrometer adjustable metering chamber. The metering chamber is aluminum with a black anodized finish. Features a crisp, permanent, laser engraved scale. The brass micrometer thimble is engraved with .01cc graduations and has a releasable detent lock. With most rifle powders each click is about a 1/10 of a grain, perfect for working up a load. Changing Powder is Fast and Easy Features easily removable hopper with an on/off valve so you can quickly return unused powder to its original container or switch to another type. The hopper feeds to a pre-measuring chamber allowing precise charges regardless of the powder level in the hopper, eliminates the need for an extra powder baffle.