For bolts with hexagonal heads, you’ll need a hex key set to ensure you can tighten or loosen them with ease. Versatile and easy to use, hex keys are usually made from a durable material such as steel. In this range, you’ll find complete sets, featuring a range of sizes for every eventuality. You’ll also find multi-purpose hex keys with a hex on one end and a ball on the other side. Choose a set that comes with a holder or case, and you’ll never lose another hex key again.