Spring Loaded Design: Built-in foot operated telescopic spring makes it available for you to open/close door, fit for most kinds of door. Foot Operation: It offers an innovative step-on mechanism for a convenient and hands-free operation. Durability: Stainless steel material, anti-corrosion and anti-rust. Rubber Foot: High-quality non-slip rubber foot for an optimum grip on most surface, and protect your floor from scratch. Screw Installation: Install on the door, this installation method is more stable, firmer, and will not fall off easily. Supplied with mounting screws to make your Installation more convenient. Package: 2Pcs door stoppers, each one comes with 3 screws. Note: Please allow 1-3mm errors due to manual measurement. Colour .