These are tools used to hold, prepare or place materials in dubbing loops. Use them with composite loops, dubbing loops and split thread techniques. These grip and hold hair, fibers, dubbing, flash. Ideal for streamer tyers and saltwater. Soft hackle and wet fly tyers can use the smaller clamps with a feather prepper to use larger feathers in loops to size them. We recommend using the the Feather Prepper tools with these.