These Ludwig Bass Drum Claws grab on to the edge of a drum set or concert bass drum. You can pass a T-handle tension rod (not included) through the central hole, which then inserts into a lug. Turn the T-handle rod clockwise and the claw will begin to pull against the bass hoop.
Rubber grommets and washers are included, guaranteeing smooth performance and a lack of rattles (bolstered by cushioned claw undersides). Two claws, two grommets, and four washers are included.