This double side block helps you load quantities of nearly any caliber you choose. Fits magnum, 308 and 223 size case heads..32 acp through.458 magnum. Also works with fast-load powder measure stand to reach every case in the block. Specifications: Type: Loading Block Caliber: 308 Winchester/223 Size: Universal Quantity: 1 Weight: .36 lb Compatible With: All Cases Material: Plastic Includes: Sleeve