Nov design ver 2.0 black magnet easy shell clamps for Brompton folding bike. These easy shell clamps make folding your Brompton folding bikes a breeze. These clamps have built in magnets, keeping the clamp in the perfect position all the time. The magnet within the easy shell clamps opens the clamp easily, and a spring is used to push the clamp plate out making the fold of your Brompton quick and easy. One set includes 2 clamps and 2 springs. Weight: 37g (+/-1g).