The line is made of x stainless steel wires, which have strong tension, durability, corrosion resistance. the Nylon coating cover also can be protective. The inside of the rolling barrel swivel (#1/0) has ball bearing, which make a great contribution to smooth rotation, so it can protect your line from being twisted. The cross lock snap (#5) is made of stainless steel, it is designed to open and close easily, you can change all kinds of baits quickly, a perfect time saver. The fishing wire leader is a perfect choice for surf fishing and boat fishing, it can be used either freshwater or saltwater.  The length of the wire is 19.6"/50cm. the specification of the swivel: #1/0,0.18″,0.8″,132lb; the cross lock: #5, 1.14", 80lb.