Add a spring to a hand tool and you’ve changed it drastically. Take for instance, scissors: You wouldn’t want to cut fabric or thread all day with even the best pair of scissors, because with every snip you have to reopen the scissors — literally a pain. But a pair of spring-loaded thread nippers open themselves, so you just have to squeeze.
Since spring-loaded tools came on the scene way back when, manufacturers have stuck with the small-and-springy combo, mostly because it works. Whether it’s nippers or spring-loaded pliers, we can see why the spring is a selling point.