Profile: Constant Ltd. specializes in providing sheet metal engineering services. Our products include protection, buffer, kicking & finger plates, pull handles, lever furniture, hinges, door strikes & cylinder pulls, signage, ventilators, threshers & angles, and metal door frames. Our pull handles are manufactured from 304 grade stainless steel. They are available as hollow and solid pull handles. Metal door frames are used to accommodate special closure systems, panic furniture, indicator bolts, and security bolts.