Redshift's Quick-Release Aerobars are different than any other aerobars on the market. The patent-pending quick-release mechanism allows you to attach or remove the aerobars in a few seconds, without any tools. You can choose the best setup for every single ride. Quick-release mechanism allows you to attach or remove aerobars in a few seconds. No tools required to remove or attach the aerobars. Aerobars always attach in the same orientation. Extensions are available in aluminum and carbon, as well as L-Bend or S-Bend shapes. Secondary safety release mechanism prevents accidental release. Massive adjustability lets you fine-tune your fit - extension length, armpad fore-aft, armpad width Fits 31.8mm handlebars (26.0 mm Shim Kit sold separately) Along with the Redshift Dual-Position Seatpost, provides an optimised aero riding position on your road bike. The Quick-Release Aerobar package contains the following: Handlebar Clamps Quick-Release Mechanisms Aerobar Extensions, Armrest, and Armrest Pads