Secure, antisway umbrella insert designed for standard patio tables Key benefits Compatibility: Inner diameter of .5 inches (38.5mm) fits standard umbrella poles and accommodates tables with slightly larger holes, increasing versatility across different outdoor settings. Durable material: Made from thick rubber for longlasting performance. The friction rubber surface grips the table hole to prevent slipping and keep the umbrella in place even in breezy conditions. Stability and protection: Acts as a rubber shim or cone holder that fills the gap between the umbrella pole and table hole, reducing swaying and minimizing scratches to the table surface to help extend the life of your outdoor furniture. Versatile application: Functions as an umbrella hole insert, base stand part, or accessory for patio tables, decks, gardens, picnic tables, and beach umbrellas. How it solves common problems Eliminates wobble: Fills uneven gaps so poles remain vertical and stable during use. Prevents damage: Cushions the pole to stop metal or plastic from scraping the table hole. Keeps umbrellas secure: Friction fit reduces rotation and slipping in wind or when adjusting the umbrella. Practical use scenarios Backyard patio: Insert the rubber cone holder into your table's umbrella hole to steady a marketstyle umbrella during family dinners and protect the table surface. Picnic or campsite: Use the shim on portable picnic tables where holes are slightly oversized to stop the umbrella from leaning or falling. Beach or rental deck: Add the insert to rental furniture or public decks where hole sizes vary; it provides a reliable, temporary solution to stabilize beach umbrellas. Product details (as specified) Inner diameter: .5 inches (38.5mm) Material: Thick rubber Functions: Umbrella cone holder, rubber shim, hole insert, base stand part accessory Simple to use, durable in performance, and suitable for a wide range of outdoor furniture configurations.