Self-Storing Bollard with Door & Lock. This unique bollard is designed to slide down into the ground or floor when not needed. Great for preventing access to parking areas. Each unit includes a sleeve that can be set in the ground with concrete. Bollard has a handle in the top to allow for easy lifting and lowering. Lift and twist to lock into raised position. Twist and lower to return to stored position. Includes locking tab for use with padlock (padlock not included) to prevent unauthorized operation. Steel construction with powder coat safety yellow finish. Specs: usable height 42"; diameter 4 1/2".