Stanley 10-099 6 in Classic 99® Retractable Utility Knife, 1-Pack

It's called "Classic" for a reason. I have owned and used this utility knife for decades. I keep one in my work truck, one in my basement shop and another in a toolbox in the utility room so there's always one handy when I need it.

Best I've ever used. After using one of these for years on constructions sites and never having a problem, I had to get myself a new one after moving into the automotive industry. I can't understand how other people work with cheap knives, complain about them, but carry on. As to other reviews concerning putting it together or taking it apart - I'm sorry, but it's dead simple and well engineered. If you have troubles with that screw, I can't imagine how you would deal with others, whatever your industry is. I have to say I use the made in the UK one.