Detailed Product Description Uses the release lever principle of work, its structure is simple and reasonable,operating cicidly,lighting on the safe side. No need to provide any drive,depending on the self-respect lock,switch fixed position. WLLScore of applicationwMin.width BillethSpan LMax.Overan.sizeWeightWH3100-30060800120016003505100-30070800120018005005170-35080800130018006005450- ...