U.S. Patent 7,472,891 & 7,722,285Canadian Patent 2,623,426 & 2,727,833These security barriers are some of the best traffic control posts you can buy. Their heavy duty metal construction and secure internal locking system guarantees they are durable and sturdy, but are also easily removable for emergency vehicles or in the case that they are only used for particular occasions. These metal parking barrier posts come in varying levels of security, and each includes our unique internal deadbolt locking system. As with many of our products, when the removable bollard is not in place the hardware is flush with the ground, creating a traffic control system that is completely unobtrusive when not in use. Our round security barriers also work as removable driveway posts to restrict access in both residential and commercial areas. Order your metal bollards today. This removable galvanized bollard with lock and key is also available in stainless steel. 36 inch Round Post Key Lock removable bollard models. The Round Post Key Lock RP 3503/RP 3503F has a 30 pound bollard post weight with a 3.5 inch OD and a .216 wall thickness. The Round Post Key Lock RP 3504 has a 40 pound bollard post weight with a 4.5 inch OD and a .237 inch wall thickness. The Round Post Key Lock RP 3506 is the heaviest with a 70 pound bollard post weight and a 6.625 inch OD and .280 inch wall thickness. *TrafficGuard, Inc complies with the Buy American Act (41 U.S.C 8302-8305)Benefits:All TrafficGuard, Inc products feature heavy duty steel construction36″ tall 4.5″ OD.237 wall thicknessPost weight 40 lbs.Patented internal dead bolt lock systemGalvanized lidded ground sleeve instantly provides flush surfaceEasily customized in colorStorage racks available for each size in hot dipped galvanized finishAll surfaces are primed with rust & corrosion resistant, zinc rich primer w/5,000 hour salt spray performanceStandard finish, TGIC polyester outdoor finish RAL1028 yellow