This is a 2.5mm Ball Wrench (3mm Socket Head) from Dubro.

FEATURES: Fits 3mm socket head. The perfect tool for getting at those hard to reach places. Ball wrenches make it possible to turn socket head screws or bolts from any angle. Transparent Red plastic handle.

INCLUDES: One 2.5mm Ball Wrench (3mm Socket Head).

SPECS: Length: 5-3/4" (14.6cm) ir/kh  

BOX DIMENSIONS: 1.75" W. X .50" H. X 6.25" L. BOX WEIGHT: .04 LBS.