3.Lee Precision Case Trimmer Cutter and Lock Stud, 1/4" Shank - 90110 Use the Lee Cutter and Lock Stud with the Case Length Gauge and Shell Holder to trim cases. Can be used by hand or with an electric drill. Works on all brass less than .475 base diameter. If you are looking for tri-mming cases with a base diameter larger than .475, order the large cutter and lock stud.