Wooden Finger Machine

An extension of the body, the machine enhances rearward communication for the wearer with minimal effort.  The user clamps the mechanism onto their forearm (either one) and inserts a finger (middle or index) into the trigger ring.  When the time is right, a quick tug at the trigger ring will launch the wooden digit in a one-fingered salute to whoever is behind.  Ideally suited to urban cyclists, the Wooden Finger Machine is constructed from workshop scrap materials, and relatively cheap to produce.