Hems are folded-back edges on sheet metal parts, which can be opened or shut. In some cases, joining two hems also acts as fasteners. Bend sheet metal with guaranteeing the next criteria; Should the bends are near to the top, it could possibly tear or crack on account of excessive strain. https://holdentjxjw.onzeblog.com/31968227/cnc-precision-bender-can-be-fun-for-anyone