Burrs left on the inside of the flash hole during manufacturing can cause erratic ignition. This handy tool automatically locates the hole and quickly removes the burr. A self-centering pilot collar with an adjustable stop allows quick alignment and prevents the removal of too much brass. It includes a Case Pilot Stop. Size 6mm, 243 Caliber Cases Type Deburring Tool Finish Green w/Black Accents Series Deburr Tool Caliber 6mm Function Deburring Includes Case Pilot Stop Material Plastic Handle w/Steel Cutter Quantity 1 Compatible With 6mm