This is for when you only want to torque a screw or nut down "finger tight" and want a quick finger tool on hand. I keep one with the correct bit fitted next to my CNC for tightening and loosening allen cap screws such as in the tool holder and for the workpiece clamps. I glued a magnet in a tool holder so I can easily place and remove it. I also put a magnet in the wrench top to stick it to the nearest piece of steel.