Lyman Flash Hole Uniformer - This handy tool removes internal flash hole burrs. Features a tool steel cutter which is inserted into the flash hole through the case neck. Adjustable stop collar allows use with any size case. Burrs are removed with a clockwise turn. Fits .22 to .45 Calibers. Removes internal flash hole burrs. ;Features a tool steel cutter which is inserted into the flash hole through the case neck. ;Fits .22 to .45