Lee 7MM/08 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 2.015 to 2.035 inches. Note- the 7mm RSAUM will also work with this gauge, but you need to purchase a # 5 knurled shell holder. Size .270 Type Case Length Gauge w/Shell Holder Finish Silver Series with Shell Holder Weight 0.07 lbs Caliber 7mm-08 Rem Function Measure Cases Includes Shell Holder Material Steel Quantity 2 Piece Media Type Brass Shell Compatible With Cutter/Lock Stud