Die-cast aluminum gold shell, powder coating, beautiful shape, quality and reliable switch position indicator can be clearly identify fast setting Cam, by spline shaft and the spring installation, without tools adjustment more convenient contact terminal, there are 8 standard contact, safe, convenient wiring, interface standard wire resistance bolt, bolt when disassembling attached to the cover will not fall off, easy installation, stainless steel the main shaft connection and mounting brackets are in accordance with NAMUR standard.