Helpful training video from the fasteners industry concerning the different options for gutter screws and how to call them out when trying to order them so that you get the correct screw for the project.
We sell these screws to gutter installers all the time for their aluminum gutters with no problems. Check out our home page which has pictures of the same screws. By the way, don't call these self-drilling screws or you will get the wrong part. Ask for needlepoint or zip screws.
Zip Screws...