The pendulums of Dutch clocks only weigh an ounce or two, and the bobs are usually made of turned wood about 2 in. diameter and 1/2 in. thick. The rod is of iron wire, hammered flat at the top end and turned over into a hook. This is hung on a wire loop at the back of the clock for a suspension. The usual length is from 24 in. to 28 in. One should be made full length, and then shortened until correct. There need be no regulating nut, the wooden bob merely sliding on the wire rod friction tight.