Cantilever patio umbrellas must be mounted in a secure base to prevent accidents. One way is an above-ground resin base or weights. A cleaner and more economical alternative is by installing your pole directly into concrete. This kit lets you do just that. It's designed for the Fiji and Bali cantilever umbrellas. Perfect for large patios and pool decks. Note: the canopy clearance will be 7.5 inches lower.