Lee 9MM LUGER Case Length Gauge is a precise, easy way to trim to length and square the case mouth. Used with the Cutter and Lock Stud or Zip Trim. Trim to length .744 to .754 inches. Size 9mm Type Case Length Gauge w/Shell Holder Finish Silver Series with Shell Holder Weight 0.05 lbs Caliber 9mm Luger Function Measure Cases Includes Shell Holder Material Steel Quantity 2 Piece Media Type Brass Shell Compatible With Cutter/Lock Stud