Lee 7.62X39R 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 1.513 to 1.528 inches. Size 7.62 x39 Type Case Length Gauge w/Shell Holder Finish Silver Series with Shell Holder Weight 0.06 lbs Caliber 7.62x39mm Function Measure Cases Includes Shell Holder Material Steel Quantity 2 Piece Media Type Brass Shell Compatible With Cutter/Lock Stud