Black 2-Piece Set: Things 4 Strings Bow Hold Buddies, Award-winning Violin / Viola Teaching Aid Flexes thumb to touch intersection of frog and stick Softly rounds and relaxes index and middle fingers; Flexes thumb to touch intersection of frog and stick Postions index finger to rest on bow Fingers still contact bow in all the customary places Universal Fit -- for child to adult hand sizes 1 Concert Black<span class="a-text-bold">Frog Frog</span>thumb/index finger shaper for Violin/Viola,<span class="a-text-italic">plus</span> 1Concert Black<span class="a-text-bold">Hold Fish</span>pinky support for Violin /Viola Positions and supports all fingers of the right hand Fingers still contact bow in all the customary places Adjustable Fit to help beginning bow hands aged 3 - Adult Fits all bow sizes Made in the USA Manufactured of the finest medical grade silicone rubber No latex allegery concerns Durable and Dishwasher Safe