Phase Lock LoopsDescription:Constructed from stainless steel material,it's sturdy and reliable enough for residential daily using.For doors and windows that require more security.Can mount either vertical or horizontal.The product consists of two parts, a body with a spring pin and a metal head for fixing.Structure instruction: Press the button, pop-up open.Widely used in variety of switchgear, control cabinets, distribution cabinets, toolbox and a series of industrial chassis, cabinet etc.