I have a lot of long flexible drill bits. This bit is fine, it needed sharpening to work properly. It also lacks lateral play, making it almost impossible to control the drill. But I sanded the gap a bit and sharpened the tip and now it cuts pretty well. Shaft flex is good and has enough power to cut through nails and even deck screws. Few drill bits can go through a deck screw. But the sharpness and geometry of the tool differed from the most preferred long flexible drills.