Be careful! I had a set of 8 ducks, but they were "liberated" by a "visitor" to my shop about 15 years ago. Haven't seen any on offer since. Been making do with ice picks since, although they are much harder to use when fairing a curve. Of course, with only 8, I often had to use ice picks to supplement them anyway, so I didn't have to learn from scratch. I originally learned to use ice picks in a sail loft, where they seem to have been the norm, back when sails were cut on a cutting floor instead of a computerized laser table or tape laying apparatus.