A JIG OF YOUR OWN ~ To make one, draw a 1⁄2-inch grid on the surface of a flat 6-by-12-inch piece of wood. Where lines intersect, drill 3⁄8-inch-deep holes with a 7⁄64-inch drill bit. To keep their depth uniform, mark the drill bit with a piece of tape. Make patterns by slipping 2-inch 6d finish nails into the holes. Wrap wire around the nails, then slip the pattern off the jig.