Chamber Case Length Gauge 9mm Luger Ensure the proper fit of your pistol ammunition with the RCBS Chamber/Cartridge Gauge. With its one-piece, non-adjustable design, this gauge checks all critical dimensions of pistol ammunition to ensure a proper fit. Simply drop a loaded round into the precision-made gauge, if it fits the gauge, it will fit your pistol. The gauge checks both chambering and cartridge length, giving you peace of mind and confidence before heading to the shooting range. Don't take chances with poorly fitting ammo - choose the RCBS Chamber/Cartridge Gauge and shoot with confidence. Simply drop a loaded round into the precision made gauge, and if your cartridge fits the gauge, it'll fit your pistol. Gauge checks both chambering as well as cartridge length. The RCBS Chamber / Cartridge Gauge is a one-piece, non-adjustable gauge designed to check all critical dimensions of pistol ammunition to insure proper fit. Description: Quickly confirms ammunition will fit your pistol's chamber Easy-to-read engravings display caliber size Check case length, diameter, and overall cartridge length Made in USA