Ring Spanner (Split) JCB 17 mm x 19 mm, two-size open ring wrench

Split ring spanner JCB 17 mm x 19 mm is a compact two-size open ring wrench designed for fastening and loosening hexagonal nuts and bolts in confined or obstructed spaces. The tool combines 17 mm and 19 mm ring profiles in a single body and features a split (cut) ring head that fits over studs and allows engagement where a full closed ring would not. Manufactured by JCB, this spanner is intended for general mechanical, automotive and maintenance tasks that require a slim, versatile hand tool.

Advantages

The split ring design enables use on fasteners with protruding studs and in positions with limited clearance, reducing the need to remove adjacent components. Combining two common metric sizes into one spanner saves space in toolkits and simplifies job site selection. The ring profile provides stable contact with fastener flats to minimise slipping and rounding, while the compact length improves access in tight engine bays, machinery housings and maintenance panels.

Suitable for

• Automotive repair and servicing where access to nuts is limited
• Mechanical and industrial maintenance tasks around machinery and equipment
• Plumbing and installation jobs involving hexagonal fittings with partial obstruction
• On-site toolkits for technicians and mobile service engineers

Key specifications

• Two supported wrench sizes: 17 mm and 19 mm
• Split (cut) ring head for use over studs and partial protrusions
• Compact length for improved access in tight spaces
• Closed ring contact profile to reduce slippage on fastener flats
• Durable metal construction suitable for repeated hand use

How to use

Select the ring end that matches the fastener size (17 mm or 19 mm). Position the split ring over the nut or bolt head, ensuring the ring contacts the flats securely. Apply steady turning force in the required direction to loosen or tighten the fastener, keeping the spanner aligned to avoid cam-out. For work on studs, engage the ring past the protrusion so the split profile sits around the stud and bears on the fastener flats. Inspect the spanner and the fastener after use for wear and ensure safe storage in a toolbox.

Usage recommendations

Use appropriate personal protective equipment and avoid applying excessive force beyond manual capacity; for high-torque requirements use a designated torque tool or larger spanner. Keep the tool clean and dry to prevent corrosion and check the ring profile for deformation before critical tasks.