Right out of the box, no other projector mount makes ceiling applications easier than the Arakno Geared Universal Projector Mount from Peerless. Specially designed with superior grip adjustment knobs that put the control of the patented precision gear system in your hands. Just set the mount and forget it. Universal Spider® adapter arms provide maximum compatibility options. Create stunning ceiling applications without the hassle. Please Note: Important Note: All projectors with M8 mounting screws require ACC-M8RI inserts for compatibility with any Peerless-AV projector mount, please refer to the Optional Accessories