An anchor for a cable or rod includes a ferrule or other spring stop, to which one or more springs or arms are coupled. The spring stop may be attached to an end or other region of the cable to enable the cable to be tensioned against a support structure. The one or more springs or arms may be, for example, one or more coil springs, one or more conical coil springs, two or more cantilever springs, or one more arms. The anchor is twisted or pushed through a hole in the support structure from a first side to a second side and contacts the surface of the second side. A ferrule spring stop may be swaged to the cable or rod.