These screws have smaller grooves which enable the screw driver to have more contact with screw head which allow us to apply more force on it.
11. Tri Wing Screw Head: ( Types of Screw Heads )
Tri Wing Screw Head
These screws are recently invented by the Phillips screw company. These screws provide more security in compared to all other screws and can sustain more force. They require special driver for their installation and removal and the deep grooves in it enable them for more torque from drill.