Truss Head #10 x 1" Robertson Square Drive Sheet Metal Screws Zinc Plated

Robertson® (square) Drive with Type A threads and sharp point
Zinc Finish with a Truss head

The Sheet Metal Screw is a thread forming screw, and it’s primarily used to pierce thin metals about 0.015-0.050 thick.

Truss Head: The truss head has a low-profile semi-elliptical top with flat bearing surface.
Metal Screw: A metal (or sheet metal) screw is often notched a the tip to aid in chip removal during thread cutting. It's also built with sharp threads to be able to cut into materials such as sheet metal, plastic, or wood.