The Dillon .300 Winchester Magnum Case Trim Die is designed to resize and, when used together with the Dillon RT1500 or RT1200B electric case trimmers, to also trim the cartridge case to the correct length.
This steel die is caliber-specific.
Brass chips / shavings are drawn off through a vaccuum manifold that clamps to the outside of the die. The vaccuum manifold is supplied seprately as part of the electric case trimmer assembly.