This barber razor blade holder is not your traditional straight edge razor casing. The Flex Razor is a rubber grip to hold your razor blade in place while giving you the flexibility to bend the blade and get better angles when you edge hairlines. The Flex Razor perfectly works with your thumb and pointer finger to make it easier for you to hit the angles and curves on your clients head. For years you would have to work with a straight razor which is not that easy for many professionals. The flex razor makes it easier and is a quick tool to learn.