Designed by Northwest angler and product rep, Derek Fergus, the SOS Golden Stone Cripple and SOS Salmonfly Cripple are tied with a small hook dangling off the back of the fly and the fly actually being tied on a flexible "string". Hook fish more effectively and on smaller, less damaging hooks yet still fish a large fly. These also lie in the water like the naturals and have been outstanding patterns for big fish! We highly recommend giving them a try. Size 12 hook.