Does not have a screw; installation is quick, easy, and secure as the ears are simply pinched. The two ears provide better and more consistent sealing force. The clamping force is improved, making it a cost-effective and simple alternative to worm drive hose clamps. Quick and easy installation, ideal for tight spaces, suitable for securing connecting pipes. Can be installed with simple ear clamp pliers, with an extended clamping range compared to the 1-ear clamp. Diameter (min.-max.): 13-15 mm. Bandwidth: 7 mm.