A floor spring is a type of door closer that is installed in the floor and allows the door to swing in both directions. It consists of a spring-loaded hydraulic cylinder that controls the closing speed and force of the door. Floor springs are often used for glass doors or heavy doors that require a smooth and elegant operation. Specification : 1) Maximum Opening Angle 105 Degree, 2) Door Hold Angle 90 Degree Long Life, 3) Leakage Proof, 4) Two Direction Opening, 5) Adjustable Closing Speed, 6) Latching Force