2 Nickel plated Lil Hookey serger seam hooks in each package. Quick and Easy to lock serger seams. Snip seam thread tails to 2.5". Slip Hookey blade into the serger seam 1/2" or more from seam end. Hook the thread tails near ends. Pull thread tails into the seam with hook slightly rotated toward fabric. Unhook secured thread tails and clip.