Lee 338 WIN MAG 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 2.480 to 2.500 inches. Size .338 Type Case Length Gauge w/Shell Holder Finish Silver Series with Shell Holder Weight 0.07 lbs Caliber 338 Win Mag Function Measure Cases Includes Shell Holder Material Steel Quantity 2 Piece Media Type Brass Shell Compatible With Cutter/Lock Stud