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Lee Case Length Gauges are an accurate and simple technique to trim the case opening to length and square it.
Used with the Zip Trim or the Cutter and Lock Stud. The first step to successfully trimming brass cases with the Lee Case Length Gauge and Shell Holder is to take the Lee Lock Stud (sold separately) and screw it into the shell holder. Next the Length Gauge needs to be screwed into the Case Trimmer Cutter (sold separately).
Each case is trimmed to SAAMI requirements using the length gauge. The next stage is case trimming once the tools have been screwed together. Simply place the empty brass in the shell holder, insert the case length gauge into the brass, and turn the cutter until the brass is trimmed to the desired length. It is that easy to get consistent case lengths and square case mouths helping to keep reloaded ammunition as accurate as possible.