I go in a lot of crawlspaces. The only time the knife gives me problems is when it falls out of my pocket. I have several simply because I have a tendency to lose tools. I should also mention that I usually have a pack of replacement blades nearby at all times. I'm an electrician and I use 5 tools daily. My drill, wire strippers, hammer, 9-in-1 screwdriver, and this knife. The knife is the only tool that stays in my pocket when work is done. You should know this is basically a box cutter and not a pocket knife. But I haven't found a need for a longer blade in my daily routines. Also, they have apparently brought out a new version that has blade storage and and even screwdriver bits attached. I prefer the stripped down original version because of the size. It's definitely worth the less than $15 price.