The SMHAEN Master dubbing twister is the only dubbing twister in the world with a 100% dubbing loop control system.This is the best dubbing twister on the market, bar none. The ability to open and close your dubbing loop with the same hand you are holding the spinner with is invaluable, and the clamp also allows you to add feathers, strung peacock, and many other materials into your dubbing loop. Click on thevideos below to seehow the Master Twister works.