The umbrella base is your perfect partner helping you to have more enjoyable outdoor time.   Made of a heavy-duty steel frame with powder coating the umbrella base is not easy to rust chipping and peeling for years to come. With 2 hand tightening knobs the umbrella stand offers a secure grip for tightening the position of the umbrella pole in windy conditions. The umbrella base is compatible with an umbrella pole from 1.37" to 1.88" and it perfectly works with the 1.37"/1.49"/1.88" diameter pole for 3 adapters making it an ideal choice for balcony poolside backyard etc.   If you are looking for a product like this do not hesitate to place an order!   Solid metal frame for long service time Stable enough to ensure umbrella safety in windy conditions 50lbs weight is heavy enough to support an umbrella Can be used with a freestanding umbrella or under the patio table Fit to a 1.37"/1.49"/1.88" diameter umbrella poles because of 3 adapters 2 hand tightening knobs to tighten the position of the umbrella Suitable for garden poolside backyard balcony etc Easy to assemble with detailed instruction