The Henderson Precision Tri-Trim Gen 3 Case Trimmer utilizes The Taper-Lock cutter head to create clean, consistent and completely trimmed cases in one operation. The cutter head has adjustable carbide blades that will last a lifetime and leave burr-free cuts on the mouth of the case. The Tri-Trim Gen 3 Case Trimmer itself is machined from 6061-t6 aluminum and a combination of 303 and 416 stainless steel. It has been engineered and manufactured 100% in America for a lifetime of service to the end user.Case preparation is a necessary evil in the reloading process. The trim operation for rifle cases is especially time consuming unless you are using a Tri-Trim Gen 3 Case Trimmer. It is designed from the ground up to make trimming cases easy, fast and accurate. The cartridge case it held by a Brown and Sharpe type collet by the rim. These types of collets are used in the machine tool world because of their accuracy and repeatability. There are 4 collets for the various cartridges one wo...