The Komelon 16' X 3/4" Self Lock 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. "These are the absolute EASIEST tape measures I've ever used" said Russ on Amazon.com, "I have every size." This 16' 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.