This is it! this is what everyone has been talking about-the self lock tape measure. This revolutionary Komelon tape measure functions like they always should have. With Komelon's self lock tape measures, all you have to do is pull the blade out, let it go and the blade stays out! to safely retract the blade, press the top button and control the speed of return. This 12 ft self lock has a nylon coated blade and its case is ergonomically designed for user comfort. Be careful! Once you try the self lock you may never use another.