1.Easily remove any stuck mouthpiece. 2.Suitable for most brass-wind instrument, including: trumpet, trombone, horn, Euphonium. 3.Rounded corner design, effectively prevent the mouthpiece from being scratched. Double screw design, uniform force. Adjustable base, more convenient to use. Instructions: 1. Adjust the upper support plate and the lower support plate to the proper position (keep parallel). 2. The cup holder of the upper support plate is stuck on the edge of the mouthpiece cup, and the two cards are stuck at the edge of the mouthpiece hoop (the mouthpiece should be in the middle of the lower support plate after the card number ) and tighten the cards. 3. The two support screws are evenly applied (turn clockwise), and the upper and lower support plates must be kept parallel. When you feel that you can't turn them any more, this is the key to the dialing nozzle.4. The rotation of the screws on both sides should not be too large, preferably in units of 3/1 turn, and the two support screws should be applied separately. Note: 1. If the mouthpiece is too tight and can't be twisted, you can put something on it and use force. 2. If it can't be screwed again, it can be pulled out with the help of pliers or wrench lever. 3. Remember to make a maximum of 3/1 turn, and apply force to the screws on both sides. 4. In order to prevent the mouthpiece from being scratched, the mouthpiece can be wrapped. Specifications:Material: Aluminum body, galvanized steel handle, plated steel base Color: Silver Size: approx 10 x 3.5 x 10.4cm/3.94 x 1.38 x 4.09inch(L x W x H)Weight: 289gPackage include:1 x Mouthpiece Puller