Runwell's "TAKE" series of tools feature beautifully machined bamboo-inspired chroe plated steel handles, designed for ease of use and a comfortable grip. As one gets used to the way it feels in the hand, managing proper torque becomes second nature.
The TAKE 45 has a replaceable 4mm hex bit on one side and 5mm hex bit on the other.
If the bit becomes loose, use a 2.5mm allen wrench and tighten the set screw on the end of the tool that secures the bit. Adding a tiny drop of blue threadlocker will prevent the set screws from needing adjustment.