Not loving this. It looks like it would walk badly on anything but the softest woods as I don't see any kind of centered tip. Secondly, the head of a screw is

Not loving this. It looks like it would walk badly on anything but the softest woods as I don't see any kind of centered tip. Secondly, the head of a screw is by necessity much larger than the body. So you're going to end up drilling pilots too large for the screw, or else have an extremely weak bite on the head and round it out with any torque at all. Changing bits on a modern keyless chuck takes about 5 seconds. Throw one in your lips while you use the other. Or if you're like me and find yourself a power tool hoarder, just use a separate drill or impact for each.