Pearl CA130 Bass Drum Mount Cowbell Holder (CA-130)The Pearl CA 130 Multi Directional Hoop Mounting Percussion Holder features non marring rubber jaws that rotate to fit the contour of the hoop for slip proof clamping power regardless of bass drum size. The knurled "L" shaped rod fits all standard 3 8" brackets and is adjustable front back and left right for perfect placement, the "L" arm is held securely by a cowbell style eyebolt clamp system.