Car Parking Barrier Features: - Durable; the cabinet is made of die-casted Zinc alloy with high quality, and the maximum weight of load-bearing is 5 tons: the cabinet is coated with varnish, being water-proof and anti-rust in harsh weather, Thesway arm is made of fiber-reinforced nylon, and it will not deform even after car crushing. - Auto-repositioning; the external force could not change the sway arm position when it is vertical; when the sway arm is forced to a horizontal position, it will reposition vertically, unless the user uses a remote control to make it down. - Noise-free; bearing transmission design of the motor makes almost zero noise. it is beneficial for battery and motor longevity and lesser friction.