Hi-Hat Attachment With ADP-20. The Pearl HA-130 Hi-hat Attachment set is great for double bass setups for added stability and fast pedal transitions. Rubber jaws rotate to fit the hoop for slip-proof clamping regardless of your kick drum's size. A cowbell-type eyebolt holds the knurled Z-rod for set-and-forget dependability. Includes the Pearl AX-20 stand clamp/adapter.