Used by the Pro's in Japan to Ex-Change one silk for another silk. Compact Hand Held Unit does all the work! Uniquely developed the Silk Changer to be Automatic! It's slick as can be. As you remove the opposite color silk the other silk is pulled into the Auto Silk Changer! Perform Beautiful Color Changing Silks with Ease! Smooth Action! Quiet - NO Motors! Easy to Use - No Fumbling! NO Spinning or Twisting!