Pre-Formed Lamination Kit #LK-11. 4-1/2" - formed for #2 square jaw Northwoods and Bridger coil springs. These kits are used to widen and strengthen a trap's jaws to help prevent foot damage, and to keep hard fighting animals from dislodging the jaws from the frame. As the name says, these are 3/16" rod cut and formed to fit a specific sized trap. Just clamp and weld. Each kit contains 24 rods, enough to do one dozen traps.