Redding Imperial Dry Case Neck Lube - 1 oz. is an essential and extremely cost-efficient product. This graphite-based powder is designed to be used inside and outside the neck of the case, which in turn reduces drag on the size button and die without creating a problem with powder contamination. People who enjoy home reloading and casting agree this lube is perfect for neck size. As with all Redding products, the lube is carefully inspected prior to being shipped and comes with a full lifetime warranty against defects in materials and workmanship.