This little tool makes locking the thread ends of serged seams a cinch. Pull thread tails back into the seam! No need to work down a knot with a pin, dab on fabric glue, fray to stop liquid, or twist threads into a big upholstery needle. To use: snip seam thread tails at 2-1/2", slip Hookey blade into the serger seam 1/2" or more from seam end, hook the thread tails near end, pull thread tails into the seam with hook slightly rotated toward fabric, then unhook secured thread tails and clip. Two Hookeys per package.