The Lee Precision Case Length Gauge is a simple and effective tool for reloaders of the .243 WSSM, designed to ensure correct and consistent case length for safety and accuracy. This hardened steel gauge serves two purposes. On its own, it functions as a go/no-go gauge to quickly check if a case has stretched beyond its maximum safe length. When combined with a Lee Cutter and Lock Stud (sold separately), it becomes a precision trimmer, cutting cases to a uniform, optimal length without any need for measuring. This affordable tool makes the critical step of case preparation fast and easy, resulting in safer ammunition with the shot-to-shot consistency needed for excellent accuracy.