Wire Combs are made specifically for plastic comb spacing. Comb spacing are rectangular holes. There are 19 double loop wires on an 11" size. These wire combs are manufactured with the same double loop technology use on 3:1 and 2:1 wire binding systems. This double wire works on any GBC, IBICO, FELLOWES, and most other comb binding spacing systems. If you like to use a system with a comb binding unit all you need is a closing or crimping unit. This makes your system a dual punching and binding system. Using 7 stainless steel wires, we usually apply 2 to 3 simple wires through the manubrium. Three double wires are placed through the body of the sternum. Double wires are placed peristernally. Using the forehand technique, we pass a simple wire peristernally through the 3rd intercostal space. The needle is reversed and is passed through the same intercostal space and then through the opposite space. Next, the 2 free ends of the wire are twisted around each other to form a loop. We usually place 3 double wires. The last wire through the sternum is usually a igure 8 in the area of the xiphisternum. To close the sternum, we cross all of the wires. A large twister is then engaged through the loops of one of the double wires. The wire is pulled up vertically until it is tight. Using a rotary movement of the wrist along with a vertical pull on the wire, we twist the wire tightly until twists are formed up to the sternum.