Hana Door Stopper Easy-Step Door Stops, 4-Inch Fast Install (Nickle) NNOVATIVE, EASY-TO-USE DESIGN: Say goodbye to old plain kickdown doorstop! JUST STEP ON IT FOR INSTANT RELEASE: Sturdy spring mechanism for easy release- No bending down, No manual lifting, No dirty shoes! HEIGHT-ADJUSTABLE RUBBER TIP: No need to replace rubber tip. MAXIMUM DURABILITY: Made from high-quality materials for long and stable use. SOLID GRIP: Sticks to all surfaces- hardwoods, concrete, tile, carpets. EASY INSTALLATION: Use enclosed guidance sheet for marking screw holes, MATCHING SCREW HOLES: Replace old models with ease.