The user-friendly ammunition measurement system provides essential data to optimize your case sizing processes. This comprehensive kit includes one Datum Dial tool for inspecting cartridge cases, along with both bullet/cartridge dials compatible with .17 Cal, 204, 224, 243, 257, 264, 277, 284, 308 and 338 bullets. Additionally, it features a laminated chart displaying common datum diameters, detailed instructions and a storage box. Interchangeable dials - the case and bullet/cartridge dials facilitate rapid measurement across various calibers Comprising only four components, it delivers coverage of the same quality as other products that include numerous components Supports multiple calibers - competing products may necessitate the purchase of a separate kit for each required caliber The measurement precision is optimized, eliminating the requirement to deduct the combined length of the body and bushing/insert from each recorded measurement Durable plastic storage container - provides additional space for setup and ensures all components are organized and protected