The unique Quick Shift Donut takes your display installation to the next level! Featuring our new “Quick Shift” lever which allows you to quickly move and lock the display freely along a pole without using any tools. The product readily adapts to poles 42mm and 50mm (1.65-inch and 2-inch) in diameter. The Quick Shift Donut utilizes a ball joint that allows infinite and easy display adjustment for any viewing angle range up to 40-degrees. Even after the screen has been installed, it is easy to change its position from landscape to portrait and can then be securely locked into position. The inbuilt “Quick Release” mechanism ensures hassle-free and secure removal or replacement of the display. - Designed for simple installation. - Ball joint allows infinite display adjustment for any viewing angle up to 40-degrees. Simple tension adjustment. - Quick release mechanism for fast display attachment/removal. - Portrait to landscape rotation. - All hardware included .