This is an L-shaped adjuster specifically for viola, made of crystal glass. This red crystal features sharp and precise cuts on transparent glass. At the top, we've placed a sparkling v-cut Swarovski (Classical Pink), a pink rhinestone. Product Name: Adjustone Crystal Clear Red Top: Swarovski v-cut Classical Pink Base: 10mm Crystal Glass Clear Red, Button Cut (Crystal with beautiful polygon cut) Screw: M2, long and pointed tip The screw can be replaced with the one currently on your adjuster. Each piece is carefully finished by hand. We support your performance by adding a premium screw to your instrument! Please be careful when replacing the screw. The instrument, tailpiece, and adjuster shown in the photos are not included with the product. #viola #ビオラ #adjustone