This small 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 double-headed pry tool is meant for greater variety than the simple one-sided pry too. Each side is a different size; one smaller, one larger to make sure you have enough space between the two pieces you're prying apart. Use the larger size if you have more of a gap between the two pieces, or the smaller one when you need to get the tool in a tight squeeze.