General description These balcony umbrella accessories include 6 pieces: 4 umbrella hole rings and 2 hand knob screws, designed to stabilize and align umbrella poles for patio tables, balconies, terraces, and gardens. The set features multiple combinations to accommodate various pole diameters, ensuring a secure fit and protection against scratches and bumps on the umbrella pole. Technical specifications Color: Black Material: Plastic, Stainless Steel Umbrella hole ring sizes: 1.5 inch and 1.9 inch Threaded screw size: 40mm M8 Package includes: 4 umbrella hole rings and 2 manual button screws Installation Select the appropriate umbrella ring size based on the pole diameter. Insert the umbrella pole into the base. Tighten the M8 threaded screws to secure the umbrella and prevent slipping. Refer to the installation teaching photo for detailed steps. Usage Compatible with patio tables, beaches, backdrops, gardens, balconies, decks, and swimming pool edges. Classic black color complements