– FF LobsterGrip is the perfect tool to hold your skin when cutting strips to Zonker flies.. You can mount it directly on your vise. The hole is 10,2mm and fits almost every vise. Use the O-Rings so its about 2cm away from the foot. This tool can also be used for many other things, when you a doubling your hackle or stripping one side of a hackle and so on.