Lyman custom fit loading blocks are a must-have for reloaders who demand organized, accurate, and durable support during every stage of cartridge preparation. Designed with six distinct sizes to accommodate a wide variety of calibers, each block is made of high-quality polymer built to withstand heavy use. The 50-round capacity and clearly labeled storage holes offer efficiency and clarity, while the interlocking design allows for neat, space-saving storage. A custom fit that's made to perform.