This is a Du-Bro RC 1/16" Ball Driver.

FEATURES: The perfect tool for getting at those hard to reach places. Durable steel driver. Transparent yellow, + shaped plastic handle with driver size engraved. Ball wrenches make it possible to turn socket head screws or bolts from any angle.

INCLUDES: One Ball Driver

SPECS: Size: 1/16" Overall Length: 4-3/4" kr6/10/03 ir/kh  

BOX DIMENSIONS: 1.50" W. X .38" H. X 5.38" L. BOX WEIGHT: .01 LBS.