My most rarely used tool is a right-angle cordless drill. It's also my handiest tool when I actually need it. I don't do a lot of plumbing or electrical right now so it's good enough and I wouldn't be without it. All of the 'attachments' I've seen looked cheaply made but I tyhink I recall seeing Tom use one on his Festool drill so I know good ones are made, I just ain't seen one in person yet.