Grip the first hole position alignment bow direction, set into the bow. Grasp the lower bow of the bow at about 10 mm above the deep bow of the bow. The violin grip allows beginners to grasp the bow pose and hand shape directly and greatly accelerate the speed of learning the violin. Will the original bow arch, tighten the bow tail screws, you can use. Product Name: Violin Grip Bow Device Material: Rubber Color: Black Product Size: 3/4 and 4/4 Length: 10.5CM Application: Beginner Package Contents: 1 x Violin Grip Bow Device Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.