Everyone needs a wrench. I’ve seen tool sets consisting of a can opener, a single screwdriver, a hammer with a plastic handle­–and an adjustable wrench. All stashed in a kitchen drawer.

Adjustable wrenches come in a range of sizes, the most common of which are 8, 10, and 12 inches. The longer the wrench, the more handle you have to grab, and the more torque you’re able to apply ...