Umbrella Frames include: Pulley and Pin Umbrellas: Most wood patio umbrellas have a push-up mechanism or pulley & pin type of feature to raise the umbrella. We recommend a simple manual push up type of operation with pin & hole option to keep the umbrella shade open for commercial applications. All too often restaurants and commercial resorts have challenges with patrons opening & closing umbrellas with pulleys and cranks resulting in damage to the unit or serious safety hazard issues from collapsing umbrellas to the unaware customers beneath the unit. The Top or Umbrella Finial: The top of the umbrella is called a final. The umbrella finial adds decorative functionality to your market or patio umbrella and provides the finishing touch to the aesthetics of the umbrella. It also serves the functional purpose of anchoring the top of the shade cover or fabric to the umbrella frame. The Umbrella Pole: The vast majority of umbrella poles are assembled in two pieces for ease of shipping and storage. The most familiar pole materials are wood or aluminum, but also may be fiberglass, steel, plastic or resin composite types. Many commercial grades solid pole umbrellas come as the single solid piece that adds significant strength to help them withstand high wind pressure and the general rigors of commercial umbrella applications around the resort, condominium pool areas, and restaurant applications. The Umbrella Rib Arms: The rib arms of a patio and market umbrella are the pieces of an umbrella frame that spread and support the shade cover into the open position. The higher the rib count usually equals more strength and stability. The Fiberglass ribs featured on some Wind Resistant Market Umbrellas are outstanding at absorbing wind gusts without breaking and last four to five times longer than traditional wood or aluminum ribs. Umbrellas with Tilt Mechanisms: Many residential patio umbrellas have tilt mechanisms as a feature to provide additional shade options for better sun protection. Tilt features come in various assortments, including buttons at the top of the umbrella frame underneath the rib hub, or crank feature tilts in conjunction with the crank handle.