A master link end of a master link assembly includes a length, a thickness, and a mating surface. The mating surface includes a first ramp, a second ramp, a third ramp, and a tooth formed by and between the first ramp and the second ramp. The mating surface may include a concave surface between the second ramp and the third ramp. The tooth includes a convex crown formed by a plurality of facets. Each facet of the plurality of facets shares a common edge with one or more facets of the plurality of facets. The common edges define or approximately define an arc of a circle.