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.
Gauge Is thickness. The higher the gauge number the thinner the metal. The chart below shows approximate gauge thickness for metal to give a relative idea of different gauges. It is in American Standard Gauge of thickness. Standard heavy weight Sheet metal for larger craft work, roofing and range hoods etc. In copper sheet it is 1 pound per square foot approximately.