SmallRig 3600 Drop-in HawkLock Mini Quick Release 1/4-20" Ballhead It can buckle vertically and stably into the baseplate, causing no deflection. It can be locked and unlocked through a click, provides an easy operation. Rubber pads on the ball head increase its friction between the ball head and the clamp, thus ensuring a secure locking. This ball head is also interchangeable with the ball heads at both ends of SmallRig Magic Arm 2070/2071/2072. Compatibility: SmallRig same size ball head magic arm Package Includes: 1x Quick Release 1/4”-20 Ball Head 1x Allen Wrench