When the scythe blade edge becomes too thick from hours of sharpening the blade will need to be peened. Peening is "cold" forging and the peening jig is the ideal tool for those who are not so experienced at peening and want a simple tool for doing the job. All that is required is to place the blade flat on the surface of the anvil with the edge against the post. Place the appropriate cap on as per instructions, and tap with the hammer as the blade is passed through. A special hammer is not required for the peening jig as the hammer is not in direct contact with the blade. A normal building hammer will suffice.