Two-piece Bow Hold Buddies set contains 1 Frog Frog thumb and index finger plus 1 Hold Fish pinky support for any size violin or viola bow. For players age 3 thru adult. Things 4 Strings accessories are teacher designed, tested and approved. Our accessory set instantly positions and supports all the fingers of the bow hold to form a relaxed and effective bow hold. The accessories uniquely train the hand to hold the bow correctly and naturally, through muscle memory, thereby freeing the player to learn and enjoy other elements of string playing. Bow Hold Buddies brand bow accessories are protected by US Patents 8,273,973, D650,828 and D650,829, Australia Patent AU2009241598, Mexico Patente No. 313970, European Union Design Registration Nos. 001156830-0001, and 001156830-0002, with additional US and International Patents Pending. The trademarks Things 4 Strings, Bow Hold Buddies, and Hold Fish are U.S. Registered Trademarks of Things 4 Strings, LLC. The trademark Things 4 Strings is Chinese Trademark Registration No. 19825050; the trademark Bow Hold Buddies is Chinese Trademark Registration No. 19825051; and the trademark Hold Fish is Chinese Trademark Registration No. 19825053. Made in USA.