This is an L-shaped adjuster specifically for crystal glass violas. This crystal features clear glass with sharp, precise cuts and a popular deep green color. A sparkling V-cut Swarovski (Light Colorado Topaz) is placed on top. It's a golden rhinestone. Product Name: Adjustone Crystal Clear Emerald Top: Swarovski V-cut Light Colorado Topaz Base: Crystal Glass 10mm Emerald, Button Cut (Crystal with a beautiful polygon (faceted) cut) Screw: M2, long and pointed tip Can be replaced with the adjuster currently used on your instrument. Each one is carefully handcrafted. We support your performance by adding premium screws to your instrument! Please be very careful when replacing the screws. The instrument, tailpiece, and adjusters in the photos are not included with the product. #viola #viola #adjustone