The Square RetractaPost-GL 900 is a highly effective, heavy duty way to protect entrances to premises from vehicles. The Square RetractaPost-GL 900 is 900mm above ground. Due to the heavy weight of the post, it incorporates AUTOPA’s lift assist system which greatly reduces the lift up weight of the product and controls the post during lowering. When lowered the post is fully below ground and covered using the integral lid. The post is lockable in the raised position by rotating the post 45° and then pressing the high-security push button 7-pin security lock. The post is unlocked using the supplied key, rotated and then lowered.