Ultra-thin Double Open Wrench Auto Repair Double Headed Spanner Drive Shaft Tool

Measure the fastener flat-to-flat width with a caliper or use a known-good wrench to identify the size. Each variant lists both jaw sizes (e.g., 14–17 mm), so select the variant whose smaller or larger jaw matches your fastener. If you are working on a drive shaft nut and a flange bolt at the same time, choose the variant that covers both measurements.

Standard open-end wrenches have a jaw thickness designed for general use, which can prevent them from fitting between a drive shaft flange and adjacent castings or brackets. The reduced jaw thickness on this wrench allows it to slide into gaps of typically 8–15 mm, making it practical for CV joint and drive shaft work where clearance is limited.

The forged construction provides consistent strength across the jaw and shank. For very high-torque applications (such as large drive shaft nuts torqued to manufacturer specification), use a breaker bar or torque wrench with a socket where access allows. This double open wrench is suited for access situations where a socket cannot be used, and should be used with controlled, steady force rather than impact.

The surface finish is designed to resist common workshop fluids including motor oil, gear oil, and light brake fluid exposure. Wipe the tool clean after use and store it dry to maintain the finish. Prolonged immersion in aggressive solvents or acidic cleaners is not recommended for any hand tool finish.

Yes. The double open-end design is useful in any application where two metric fasteners need to be held or turned simultaneously, or where jaw clearance is restricted. Common non-automotive uses include bicycle bottom bracket work, machinery maintenance, and plumbing fittings with metric hex flats. Confirm the jaw size matches your fastener before applying torque.

Both variants share a 13 mm jaw on one end. The difference is the second jaw: 15 mm versus 16 mm. Choose based on which secondary fastener size you need to pair with 13 mm. If you regularly work with M10 bolts (13 mm head) alongside M10 or M12 fasteners, check the specific head sizes on your vehicle's service data to select the correct pairing.

Store the wrench in a dry toolbox or roll cabinet drawer. After use in wet or fluid-contaminated environments, wipe it down with a clean rag and apply a light coat of tool oil or corrosion inhibitor spray. Avoid storing it in contact with bare steel tools without a protective coating, as galvanic contact in humid conditions can accelerate surface oxidation.