|00:37The Tension Hoop of a banjos is usually a metal hoop that is drawn down to tighten the head of a banjo. Some hoops have notches for the tension hooks, some have a groove that goes around the entire circumference of the hoop, a few have holes that the hooks fit into. Simple hoops have no allowance for aligning the hooks, which simply fit over the top of the hoop.
Top tension banjos have specially designed hoops that accept a bolt down through the top so that the head may be tightened without removing the resonator. Some of the oldest banjos use wooden hoops or no hoop at all, merely tacking the hide into place.