Simply slip the wire through the edges of your lace project and place pins along the inside of the wires to hold them in place while the lace dries. If you have scalloped edges you will want to slip the wire through the outer edges of your scallops to emphasize them. Set comes with 15 (34.5"/880mm long) straight wires (est. 15 gauge), 20 nickel-plated T-pins and blocking instructions. All wires are stainless steel and rust proof. The first time you use your blocking wires, wipe them with a soft cloth to remove manufacturing residue.