Little Crow Gunworks developed the Worlds Finest Trimmer 2 as a precision tool that will last a lifetime. One of the unique features is that the WFT 2 uses a source of power that most reloaders already own... a cordless or electric drill. All reloaders have to do is adjust the trimmer to their desired preference then simply chuck the WFT 2 into the drill and start feeding cases by hand. A pace of 10 cases per minute is easy to maintain and some experienced users can trim faster than that. This is a replacement factory cutter that will replace a worn out cutter on the World's Finest Trimmer 2. This carbide cutter is 1/2" with a 1/2" shaft. If your Worlds Finest Trimmer 2 is getting a little dull this new cutter will bring the life right back into the trimmer. Note: High Speed Steels are high-performance special steels offering high hardness at temperatures up to 500AdegC and high wear resistance