Cup Point Set Screws feature a hex drive at one end and a cup-shaped indentation at the other. The thin edge of the cup end digs into the contact surface...
Cone point set screws have a sharp, cone-shaped point that wedges into the contact material thus delivering the strongest torsional and axial holding power...
Half Dog Point Set Screws are fully-threaded, headless screws with a hex drive at one end and a protruding tip with a flat surface at the opposing end....
Alloy Knurled Cup Point Set Screws feature serrated ridges or knurls in the indented cup that bite into the contact material and effectively lock in place...