Lyman Ammo Checker Block 9mm 100 Hole Brown. These Lyman reloading tools are machined from solid 6061 aluminum and cut with custom tooling to SAAMI minimum chamber tolerances. Lyman Ammo Checker Multiple Blocks allow reloaders to check dozens or even hundreds of cartridges at one time. These reloading tools simplify the reloading process by allowing the shooter to visually confirm the condition of the cartridges as they are seated. Once the cartridges have been seated lightly wipe the chamber with a lint-free cloth and slide the ammo into the block where it is checked. If it is smaller than the chamber tolerances the cartridge must be resized. Specifications for Lyman Ammo Checker Multiple Block: Manufacturer: Lyman Fabric/Material: 6061 Aluminum Package Contents: Lyman Ammo Checker Multiple Block Lyman 7833036: Ammo Checker Block 9mm 100 Hole Brown