Designed to form a dimple in a standing seam deck it can also be used to crimp the seam to facilitate seam welding.
Both jaws and lever arms are of aircraft quality, heat treated, stainless steel.
Each lever arm has a threaded hole to store a spare button die, the hex wrench necessary for installing and adjusting the button die is stored on the long arm.
The tool is shipped with two spare button dies installed, the hex wrench is included.