This is the Speed Tip 2.5mm Hex Wrench from MIP.

FEATURES: Constructed of steel Can be used in power tools with an adjustable clutch

INCLUDES: Speed Tip 2.5mm Hex Wrench from MIP with instruction sheet

SPECS: Length: 4.6" (117mm) Tip Size: 2.5mm  

BOX DIMENSIONS: 4.00" W. X .25" H. X 6.38" L. BOX WEIGHT: .05 LBS.