Shank: The smooth area of the fastener between the head and the thread. Screw types vary and some screws do not have a smooth shank. Thread: The ridge that wraps around the cylinder and forms a helix.

Familiarizing yourself with the different types of screwdrivers ensures you ... leading them to often be called “star bits.” ...

Other types of screws may not hold as well ... They might be too thick, too smooth, or have the wrong head shape, which can lead to poor fastening or even damage to the drywall sheets.