The RCBS Flash Hole Deburring Tool is exactly what you need to remove the burrs that are often left on the inside of cartridge case flash holes during the manufacturing process. These burrs can cause erratic ignition, which may affect your accuracy in the field. To remove those burrs, the RCBS Flash Hole Deburring Tool is the perfect solution. This tool comes in a variety of caliber-specific sizes and quickly and automatically locates the flash hole and removes any burrs. This tool has a self-centering pilot collar and an adjustable stop that ensures quick alignment and the removal of just the right amount of brass.