Lee 7.5x54 Mas Case Length Gauge And Shell Holder. 5x54 Mas Case Length Gauge and Shell Holder - After a case has been loaded a few times it will stretch beyond maximum length and must be trimmed. The case length gauge (pilot) and shell holder must be ordered as case length gauge and shell holder for each caliber. Second you must order a case length gauge for each case you are going to trim. The case length gauge (pilot) is simply the ruler that is used to measure the length of the case to be trimmed (instead of squaring the case mouth). The shell holder must be ordered separately (the base of the shell holder is drilled) and then the shell holder must be drilled"in" to fit the shell holder to the case. For this 7.5x54 caliber we offer two shell holders that are sold separately. Specifications for Lee 90051 7.5x54 Mas Case Length Gauge And Shell Holder: Manufacturer: Lee Caliber: 7.5x54mm MAS Additional Features: Gauge/Shell Fabric/Material: Hardened Steel Package Contents: Lee 90051 7.5x54 Mas Case Length Gauge And Shell Holder The Lee 90051 7.5x54 Mas Case Length Gauge And Shell Holder is a quality addition to the Lee Precision lineup. For more great deals on Case Trimming by Lee Precision please browse our Lee Reloading Equipment page. Lee 90051 7.5x54 Mas Case Length Gauge And Shell Holder