Socket Set Screws

Socket set screws have the same purpose as a slotted set screw but can apply more torque when tightening.  They are typically made from alloy steel per ASTM F912 the part is through hardened opposed to the case hardening on slotted set screws. They also come in stainless steel, brass, bronze and many other materials depending on the end use.  Common point styles are: 

Alloy Socket Set Screws
Stainless Steel Socket Set Screws
brass socket set screws
Brass Socket Set Screws