One hand opening single blade folders are very practical. I usually find myself holding what I want to cut with one hand before I pull out a cutting tool. The locking blade also enables types of work I would not do with anything else other than a fixed blade. There are new models of multi-tools with one hand opening, locking blades which I find very useful. I do usually carry a single blade, one hand opening, locking blade folder, and I do use them frequently for cutting just about everything imaginable, even in the kitchen.