A crank is used to open and tilt the patio umbrella. When the sun moves, you don't need to stand up to reach the tilting button, just crank it to tilt the angle of the umbrella, away from direct sunlight. This patio umbrella is made of 100% solution-dyed polyester, water-resistant, and blocks up to 98% of UV rays. 9 ft diameter outdoor umbrella shades your 42" to 54" round, square, or rectangular table and 4 to 6 chairs. Ideal for residential and commercial spaces, such as gardens, pools, porches, balconies, lawns, and any other outdoor places. An aluminum pole and 8 steel ribs, finished with a rust-free powder coat in Black Matte, provide better support for the market umbrella.