Part of the RAIL™ Mounting System, the QS Rotator Block allows mounting at almost any angle. The internal rosette pattern prevents accidental rigging issues. It can mount to the QS Slider or directly to the RR and R2 Mounting Rail. It has an ergonomic oversized locking knob for easy locking. It has a 5/8 and 3/8 slots to lock onto gobo arms, Norms Pins and much more.