The RCBS Lube-A-Matic 2 is perfect for the serious bullet caster. Just insert a bullet in the sizer die and pull the handle and in one easy step, a sized and lubricated bullet emerges on the upstroke. The fingertip regulator makes for fine-tune lubricant flow, so just the right amount is used. The Lube-A-Matic also automatically seats gas checks and is compatible with either RCBS or Lyman sizing dies and top punches (not included). Requires hollow stick bullet lube. Lyman Gas Check Seater can be installed.