This is a Five Piece Metric Ball Wrench Set with Holder from Dubro.

FEATURES

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.
Includes Black plastic holder that mounts with screws (included)
on a field box or work bench.

INCLUDES

Five Ball Wrenches:
1.5mm (2.0mm socket head)
2.0mm (2.5mm socket head)
2.5mm (3.0mm socket head)
3.0mm (4.0mm socket head)
4.0mm (5.0mm socket head)