Abstract: An apparatus includes a pair of opposing arms having a first arm and a second arm. The first arm and the second arm are joined at proximal ends. Each of the first arm and the second arm include a first section comprising the proximal end, a second section positioned between and connected to the first section of and a third section, and the third section having a first end portion and a second end portion. The third section having a first curvature disposed between the first end portion and the second end portion. The third section of the first arm includes a plurality of separating elements that extend from an interior surface of the third section.