The wrenches feature 2.5 degrees of arc swing and 144 ratcheting positions, allowing quick and efficient work in tight spaces. The flex head wrenches have double-stacked pawls within the ratcheting mechanism, which increases durability and extends the life of the tools. The tools flexible head design provides increased accessibility in difficult-to-reach areas. The MAXBITE open-end grip on these wrenches improve grip on nuts and bolts, offering you 25 percent more torque than smooth-faced wrenches. The wrenches also feature ergonomic I-Beam handles designed for improved comfort, along with ink-filled size labels for easy size identification and quick and easy distinction between SAE and metric applications. Tool sets are backed by Milwaukee's lifetime guarantee. Order the set best suited to your needs.