[youtube http://www.youtube.com/watch?v=BKYGnkroXPQ?hl=en&start=0&fs=1&rel=0&showinfo=0&ap=%2526fmt%3D18&w=600&h=361]

Which is a mouthful, but it makes sense if you think about it — a jig for a table saw that helps you make box joints with the help of a threaded rod controlled by a wooden gearbox. The maker, Joe Beuckman, began with a box joint jig from Woodgears.ca and then put his own spin on it. [Thanks, Dave!]