Drywall screw can be used to secure the drywall to either wood or metal framing members, and is designed to minimize dimpling on the face of the walls.
Sharp point drywall screws and self drilling screws are the types pf the drywall screws.
Self drilling drywall screws should be used on drywalls to fix between 0,90mm to 2,5mm metal elements.

3,5 X 25MM 

3,5 X 35MM 

3,5 X 45MM