The Lee Lube and Size Kit is one of the fastest and easiest ways to lubricate and size cast bullets. The sizing die that comes with the kit fits in any press that accepts standard 7/8"-14 threaded dies. Bullets are pushed through the sizing die nose first, so no special top punches are needed. Gas checks are automatically seated and crimped in place. Sized bullets are captured in the special container which is included and doubles as a storage case for the die. Specifications: - Diameter: 0.510" - Material: Steel - Electric: No