You work hard to make sure everything works like it should, & this 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 2 jobs are alike, this set comes in an array of sizes & measurements, so you will always have what you need on hand. Includes quick-release ratchets in 1/4", 3/8" & 1/2" drives 152 sockets (6-point, 8-point & 12-point) in both inch & metric sizes 4 extension bars help extend your reach 8 combination wrenches let you slip in where the ratchet won't go Comes with 1 magnetic handle with 12 nut drivers in inch & metric sizes 96 screwdriver bits give you quick power & versatility Comes with 40 hex keys & 4 adapters Includes a 3-drawer case Material: Stainless steel Drive socket depth: Standard & deep Case dimensions: 18x12.5x12 (inches)