The unique design of the 3D Chinrests allows the height, the lateral position, and the angle to be adjusted to guarantee the best fit even for those with a long neck. Equipped with titanium clamps The 3D Chinrests are on average 30-45% lighter than typical Ebony chinrests, and reduces the chance allergic reaction dramatically. The 3D Chinrests come standard with 2 different plates, one for over-the-tailpiece chin position like Flesch, another for left position like Guarneri. Tools included.