A good set of wrenches should include a range of sizes, both standard and metric, as well as various types of wrenches, such as open end, ring and adjustable wrenches. Many kits also include a ratchet wrench, which makes it easier to tighten or loosen bolts in tight spaces. Whether you’re a DIY enthusiast or a professional mechanic, a quality wrench set is an essential part of your toolbox. Look for sets made of durable materials like chrome vanadium steel or carbon steel, and consider the grip and comfort of the handle when buying.