A combination wrench has an open end and a closed, box end, and these usually fit the same size nut or bolt.
Typical applications
- Combination wrenches turn nuts and bolts with flat parallel faces. Pipe wrenches grip round pipe.
Advantages
- A generic combination wrench offers both open‑end and box‑end fittings in a single tool. This dual‑format design lets users choose the appropriate end for a given fastener, but it does not imply a higher torque capacity compared to separate wrenches.
Specifications to check
- When selecting a combination wrench, the fixed size must match the fastener. Inch and metric sizes are distinct systems; a near match is not a correct fit.
Limitations
- The generic combination wrench’s size marking does not indicate an applied tightening torque. This guide does not provide any torque value or electrical‑insulation rating for the tool.
Buying considerations
When buying a generic combination wrench, first identify the exact fastener size and the available access before purchasing. Then check which end of the wrench can fully engage the fastener; do not assume that inch and metric sizes are interchangeable.
Safety & limits
- Do not use damaged wrenches or add a pipe to extend the handle. Eye protection is required where flying particles or falling debris are hazards.
Sources & further reading
These links document the information used in this article. Manufacturer specifications and source research are not hands-on test results or an endorsement of a purchase.
- CCOHS: wrench guidance
Reference checked 2026-10-28