Our Mission: To protect, preserve and promote the natural integrity of Radnor Lake through land acquisition, environmental education and park support.
Chains up to 12 mm thick are generally portable: you can carry them around on your bike every day. The long ones will be really heavy though, so please check the weight. Above 12 mm the chains are more suitable as stationary locks: you would leave them wherever you lock your bike for long periods of time.
Very strong and durable material typically made from 87% copper and 13% zinc. Using 100% brass would render the zipper chain too soft and not usable for many heavy-duty type applications. aluminum