This is the worst thing I could do when installing a quartzite countertop. I installed them before my bar counter was installed by the stone company and little did I know that the flex braces basically caused my quartzite to break in half. This is a terrible product, the steel is poorly assembled allowing it to flex and not provide stability to support the weight of the countertop. It ended up costing me more money than I wanted to spend because now I had to get the guy to come back and fix the crack. It was a waste of money, this company should return the money and there should be a disclaimer letting you know about the staples bending before you even buy them!