Metal Chains. Nov . 15, 2002. There are ... extremely close fit between sprockets and link and are not designed to ... efficient operation of standard roller chain, except that pitch is twice as ...

In a similar vein to the metal chains, some trucks may use static discharge strips. These are similar in concept to the chain, hanging off the back of the truck and dragging slightly along the ground.

Rain chains come in many varieties such as ornamental chain links, cascading enamel cups, copper pails, and flower petal designs, not to mention leaves, fishes, and umbrellas.