This ridged pry tool is primarily used for gentle opening of your device. Be it prying up your iPhone screen or peeling away the glass battery cover of your Galaxy S7, each of these pry tools are designed to be thin enough to fit in tight places and sturdy enough to allow for smooth, gentle prying. The flat side of the pry tool is meant for separating two pieces of your device, while the small "ridge" in it is designed to make it easier to slide along an edge. Think of it as a "guide" of sorts. The pointed side is often used to peel away adhesive strips in small, hard to reach areas while making sure not to scratch any surface.