The EGW .223 Remington 7-Hole Cartridge Checker is designed to prevent jams and other malfunctions by verifying ammunition dimensions.
Constructed from 6061 T6 aircraft grade aluminum, it uses Clymer reamers for precise measurement of ammo to match chamber specs.
It checks both the minimum case diameter and the maximum overall length of the .223 Remington cartridges and is finished with an anodized matte black coating.