The MT series are the standard unwired 1/4 inch jack socket patch bay that Switchcraft manufactures. It features rugged steel long frame stereo jack sockets with gold plated switching contacts. The ground (earth) connector is offset to enable common ground buss connections. All solder points are fanned to assist with soldering process and the removable front jack panel allows solder connection from the front. The types we show here have the jack sockets configured ""full normal"" but other switching configurations are available. These include "HN" Half Normals, "NN" no Normals" and NS Normals strapped ,Please contact us for further details