DW Hardware DWSM2141 Claw Hook Clamp With Convertible L ArmAdd a cowbell or accessory to any DW bass drum in seconds with this ultra sturdy, stand free attachment. This DW Claw Hook Cowbell and Accessory Clamp quickly and easily attaches to your bass drum hoop. It includes an L Arm (DWSMTA905) and is a 1 2" to 9. 5mm for mounting percussion accessories. Note: DW claw hook clamps have a rounded hook that can dent or damage bass drum hoops with a square (90 degree) edge. *