Description【Patio Umbrella Accessories】Perfect for your patio, these black PP and steel umbrella tightening screws ensure that your outdoor umbrella stays firmly in place even during windy days, providing a stable and secure experience for you and your family.【Plastic Threaded Knobs】Features-Color:Black -Material:PP, steel -Size:3.50X3.50X0.80cm/1.38X1.38X0.31in 【Umbrella Base Adapter】Threaded Handle Knob Enables Smooth Adjustment And Tightening Of The Umbrella 【Umbrella Base】Deck Umbrella Base Compatible With Most Standard Sized Poles Enhancing Compatibility 【Umbrella With Base Outdoor Patio】Stability Enhancement Features Improve The Overall Safety Of Patio Umbrellas 【Umbrella Handle Screw】Ideal For Outdoor Umbrellas Enhancing Stability In Gardens And Patios 【Outdoor Screws】Reusable Parts Allow For Multiple Adjustments And Replacements