This is a .050 Right Angle Ball Wrench (4-40 Set Screw) from Dubro.

FEATURES: Fits 4-40 set screw. Ideal for most wheel collars and other set screws.

INCLUDES: One .050 Right Angle Ball Wrench (4-40 Set Screw).

SPECS: Length: 3" (7.6cm) ir/kh  

BOX DIMENSIONS: 3.13" W. X .13" H. X 3.13" L. BOX WEIGHT: .01 LBS.