Lee mold blocks are made from aluminum because of the exceptional molding qualities. The mold cavities are lathe bored for unmatched roundness and size control. The Lee Drive Key slug is loaded in a standard trap hull with standard wad and conventional folded crimp. The exclusive drive key positively rotates the slug in rifled shotgun barrels. The key doubles as a support rib allowing the use of a standard trap wad. Mold feature self-centering automatic core pins for maximum speed and convenience. Mold includes sprue plate, handles, complete instructions and suggested loads.