The Stonfo Rotodubbing #2 Split Dubbing Twister has split wires to build your dubbing loop with instead of the Y style arm. This is a really nice tool for building dubbing loops using zonker strips to make rabbit hair hackle like wraps. The rotating mechanism has ball bearings in it for smooth rotation. The Stonfo Rotodubbing #2 Split Dubbing Twister comes with detailed instructions.