Provide a more secure fastening between the awning fabric and the tension or blocker rafter to prevent the unpleasant noise of a flapping awning fabric due to wind Just click it on the rafter, put the fabric inbetween and tighten with the handle Use up to two clamps on one side of the awning Fits: Oval rafter from G2 Blocker sides, Tension Rafter G2, Support Arms for Thule Omnistor 1200 Content: 2 Clamps
