This Illustration shows the head of a screw or bolt and the drive type associated. Shown are: Cross-Recessed Phillips; Square Socket; Pozi-Driv, Slot & Square Socket; Frearson; Indent Hex Washer; Phillips & Slot; Indent Slotted Hex Washer; Slot (also called straight head); Phillips Pyramid; Cross Slot; Clutch; and Torx.

Screw and Bolt Drive Recess