Craftsman 320-piece mechanic's tool set helps you get the job done. From any project as complicated as spending the day under the hood to a task as simple as tightening bolts, you'll have the tools you need. Since no two jobs are the same, this set comes in an array of sizes and measurements, so you will always have what you need on hand. Includes quick-release ratchets in 1/4", 3/8" and 1/2" drives 152 sockets (6-point, 8-point and 12-point) in both inch and metric sizes 4 extension bars help extend your reach 8 combination wrenches let you slip in where the ratchet won't go Comes with a magnetic handle with 12 nut drivers in inch and metric sizes 96 screwdriver bits give you quick power and versatility Comes with 40 hex keys and 4 adapters Includes a 3-drawer case