This is the craziest joinery system I’ve ever seen. Lamello’s Invis system of knockdown fasteners consists of male and female parts that are sunk into your workpieces-to-be-joined. Once the pieces are lined up, a magnet inside of a plastic box is then attached to your drill. You spin the drill near the fasteners, and the screw in the male part starts turning. Here’s a demo of a guy using it to attach stair treads: