What tool?

[longdogs]

What tool would you most like to be invented and manufactured to help in your DIYing or profession?

One of my ideas was for an electric saw that takes half inch off the bottom of a door without having to take the door off - although I suspect that these might now be available.

 

[Igorian]

You mean one of these.

I wanted a device that screws on the bed and does all the housework. Then I got married