With a versatile two-sided design that offers three different case fits per side, RCBS' universal case loading block fits most standard rifle and pistol cases, included the WSM, WSSM, and Ultra Mag families of cartridges. The short pistol cases fit in the raised upper portion of the block for easy access, while the stepped holes accommodate larger pistol and rifle cases. Able to hold up to 50 cartridges at a time, this block helps you stay organized and avoid dangerous mistakes during the reloading process. WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. | RCBS Universal Case Loading Block | Size 8.6" x 1.5" x 9.9"