Security door bolts is also called security flush bolt, barrel bolt lock, door security bolts, internal door bolts, latch bolt, flush door bolts, gate bolt lock, surface bolt lock etc. It can be used on double door, metal door, heavy duty door, washroom door, bathroom door, internal door, office door, outer door, swing door etc. As it has a wide range of applications, so the security door bolts can be used on most of doors, the flush bolt can be fixed inside or outer. The main raw materials of internal door bolts can be stainless steel, zinc alloy, brass, aluminum. You can certainly find the suitable barrel bolt lock which you want. As a professional door bolts manufacturer in China, our security door bolts are sold in many countries and have a good reputation, choose us and You will get more profit.