Many customers have been after this fantastic leader making wire. Twist-Weld is the strongest and most convenient leader material available. All you need is a match or a lighter. Perfect for on-the-spot leader construction. Simply twist wire 6 or 7 times and fuse with a flame. The No-Slip loop formed provides 100% knot strength and requires no special tools or crimps. Black color. Choose from the 25' or 100' spools. All serious anglers should have a spool in the boat!