Violin Fine Tuner Screws - Set of 2 - Wittner Germany - 2 Colors - For 4/4 Size Purchased new last year at a musical instrument store in Osaka and used until recently. I used these on the E string of my full-size (4/4) violin. Can also be used on a viola. Suitable for any string with a ball end. The subdued colors offer a discreet touch of style. Precision fine tuner screws made by Wittner Germany: ① Black with turquoise blue screw top ② Gold with yellow gold screw top - Brand: Wittner - Model: Tuner Screws - Colors: Black, Gold - Made in: Germany - Features: L-shaped screws. Thank you for looking.