This Musket tool is used to service your musket. The pickering tool is used to clean your touch hole, has two flat head screw driver blades to remove the screws from your lock. This tool was used during the last quarter of the 18th century by the military. You can see one of these in The Encyclopedia of the American Revolution. The tool stores nicely in your shooting pouch or haversack. The overall measurements are 4" long x 1 1/4" wide.