Launce Barber and Tom Stokes designed the patented* Li'l Guppieâ„¢ as part of our innovative I.D. Worksâ„¢ line of tools. It's a smaller and lighter version of our popular Guppieâ„¢. The adjustable wrench jaw opens to 10 mm so you can use it for all kinds of light repair and assembly jobs. You can carry the Li'l Guppie on a belt loop, D-ring, pack or rope. (Remember, the cool carabiner is not designed to be weight-bearing.)