If you spend a lot of time working with RC cars these are the best tools you will ever buy. Simply put by using one of these over a traditional allen key you will take around 1/20th of the time to do the same job. They really will unscrew or screw up your hex bolts about 20 times faster than any other method.
These are bullet proof hex drivers. They come (in metric form) in 1.5, 2.0, 2.5, and 3.0mm which suits nearly all RC cars.
The blades/tips are made of harderned steel and are easily replaceable should they break or wear out. Although I can't see that ever happening. I've bought lots of RC tools but by far and away have these saved me the most time.
Downsides? They don't come labelled with sizes on the drivers themselves or on the box! Both these issues would be so easy to solve. Also whilst the small 1.5 mm one can be used to change the tips on all the others, a 1.5 allen key would be a great help and cheap for dynamite to include as you could then use it on all the hex drivers.
They have spinners at the end of each driver meaning you can apply lots of pressure whilst turning them.
Overall about the best RC Tool I've ever bought!
WARNING: 