This is the MiP Spd Tip Hex Metric Wrench Set. MiP are renowned in the RC industry and are seen as the must have tools in anyone's tool box.
The set comes with the 3 most popular metric hex sizes that can be used with most power tools to help loosen the most stubborn of screws.
MiP Spd Tip Hex Metric Wrench set Included tips;
2.0 mm tip
Here's a short video from RCN Network about how great these tools are