Anti-theft door lock bolt uses zinc alloy to provide more sturdy quality, which makes the house a safer place; Available to enhance hotel and home security; hard to rust and increase service life; Multi-hole installation, not easy to loosen, four-point and fixed installation, simple, fast and stable; Seamless craftsmanship: CNC machining, precision and seamless, overall appearance smoother; The positioning of the round steel ball and the thicker design allow the product to be forced to a more violent impact. Specifications: Material: zinc alloy Function: home guard, door lock Color: black / silver Technical statistics: Multilayer veneer, thicker solid