Concrete Drill Bit

This is a drill bit use as a cutting tools to create cylindrical holes in concrete.  This tool is held in by a drill which rotates the bit to produce torque and axial force to create the hole. The shank is the part of the drill bit grasped by the chuck of a drill.

Ikea Lamp (Lever and Screw)

The white piece of plastic I am holding acts as a lever to move the head of the lamp, the bulb of which is protected by a sheet of glass held in place by four screws. Ikea has it all.