Pair of Knee Defenses (Poleyns)

The Pair of Knee Defenses (Poleyns) are two silver-colored metal pieces. The item in the image appears to be a single knee defense. It is shaped like a kidney bean with the rounded part on top and the narrower part facing down. A small curved piece extends from the side on the left. The surface of the metal has a textured appearance with darker spots scattered across it. The background is light gray.