The 4-in-1 System transforms to quickly switch between a Compact Right Angle, Standard Right Angle, Right Angle Flexible Shaft and Straight Flexshaft. Height Long life gears - provides up to 5X longer life 1.5 in.
I've used it a few times as a carpenter. When it is necessary to drive a #10 screw in limited space, this tool is invaluable. A little bit awkward, but significantly better than without the tool. I doubt I will ever use the gimmicky side handle. It is very small & feels like very low density plastic.