The DeWalt DWMT72191OSP 5/16-In. (8mm) Combination Wrench is a single SAE hand wrench built for turning 5/16 inch fasteners with better reach and better control. This is a combination wrench designed for fastening and general mechanical service. Model Number: DWMT72191OSP. If you need a small wrench that does not feel like an afterthought in the toolbox, this one is made to give you more leverage than a stubby pattern and better fastener contact than a basic open-end wrench alone.

The biggest advantage here is the long panel design. On the job, that means more reach into spots where your hand position is awkward and more usable torque when a fastener is tight. DeWalt also uses DirectTorque technology to help reduce fastener rounding, which matters most on smaller hardware where damaged corners can turn a simple repair into a headache.

This wrench is set up the way most mechanics and maintenance users want a daily-use hand tool set up: open end on one side, box end on the other, and a full polish chrome finish that wipes clean easier after greasy work. The stamped hashmark pattern on the handle gives you extra grip points without making the wrench bulky in your hand.

The 13 degree offset box end is another detail that earns its keep. It gives your fingers and knuckles a little more clearance when the wrench is sitting against nearby parts or sheet metal. That is a small spec, but it makes a real difference when you are working in cramped mechanical spaces, equipment housings, or under-hood service areas.

This DeWalt wrench is a good fit for mechanics, maintenance techs, equipment owners, and serious DIY users who want an individual 5/16 inch combination wrench instead of buying a full set just to fill one missing size. It is especially useful for automotive work, small fastener service, shop maintenance, and general repair where a dependable SAE wrench belongs within reach.

DeWalt DWMT72191OSP 5/16-In. (8mm) Combination Wrench That Does the Little Stuff Right

This is a straightforward small SAE wrench with the details that actually matter when you are leaning on a stubborn fastener.

• Who it's for: Mechanics, maintenance techs, and anybody replacing a missing 5/16 inch wrench with something better than bargain-bin filler.
• Why it stands out: The long panel design adds leverage, the DirectTorque geometry helps reduce fastener damage, and the offset box end is easier on your knuckles.
• Worth knowing: This is an individual wrench, not a set, which is exactly what you want if you only need to fill one gap in the drawer.

• Is this an SAE or metric wrench? It is an SAE wrench with a 5/16 inch opening size. DeWalt also references 8 mm in the product name.
• Is this sold as part of a set? No. Source data lists it as an individual wrench with a piece count of 1.
• What helps this wrench grip fasteners better? It uses DeWalt DirectTorque technology, which is designed to help prevent rounding fasteners.
• Does the box end have any offset? Yes. The box end has a 13 degree offset for added knuckle clearance.