The RCBS Universal Reloading Tray is a solid, steady plastic platform that holds 40 cases at a time to streamline powder charging and inspection. Stepped holes minimize case tipping to reduce powder spillage. Fits most rifle and pistol cases. This block actually has 80 holes in it. 40 holes are marked #1 and 40 holes are marked #2, these holes alternated so there is space in-between each case when it is in the block.