The Pearl HA-130 Hi-Hat/Bass Drum Attachment clamp is a must for the double bass drummer. By attaching your hi-hat stand to the hoop of your secondary bass drum, the HA-130 keeps your hi-hat and bass drum pedals in secure adjoining positions, making foot transition easy and efficient. Simply fold the hi-hat stand legs in, attach the insulated hoop clamp to the bass drum, secure the two-sided Quick Set clamp to your stand, and use the Right Angle Bar to position the pedals together. All clamps include memory locks to keep your settings tight and slip-proof, for security in repeated set-up and tear-down. Includes ADP-20 Attachment Clamp, Right Angle Bar, Clamp Rod, and Insulated Bass Drum Hoop Clamp.