The CM400 is a corner mount adapter designed for use with Spectra® and Legacy® wall mounts. For Spectra, DF5, or DF8 Series pendant domes, use the IWM Series or IDM4018 wall mount. For Legacy positioning systems, use the LWM41 wall mount. The LWM41, IWM Series or IDM4018 wall mount is secured to the CM400 by four 5/16-inch mounting studs, nuts and split lock washers are supplied.