Ring Spanner Offset Dedra 16 x 17 mm model 1428P

Offset ring spanner Dedra 16 x 17 mm model 1428P is a compact hand tool designed for turning 16 mm and 17 mm metric nuts and bolts in confined or recessed spaces. The bent, offset heads provide improved access where a straight spanner cannot reach, making the tool suitable for workshop, garage and field use. Made by Dedra, this spanner is intended for routine mechanical repair, maintenance and assembly tasks that require reliable engagement with hex fasteners of the specified sizes.

Advantages

The offset ring design delivers secure, full-contact engagement with hexagonal fasteners while the bent heads create clearance for obstructions and allow leverage without scraping surrounding surfaces. The dual-size configuration (16 mm and 17 mm) reduces the number of separate tools required for common metric fasteners. Its compact length improves maneuverability in tight engine bays, machinery assemblies and maintenance environments.

Suitable for

• Automotive repairs and adjustments in tight engine or chassis spaces
• Mechanical maintenance of machinery and equipment with recessed fasteners
• Assembly and disassembly tasks in workshops and service vehicles
• Field service and maintenance where portability and access are required

Key specifications

• Working sizes: 16 mm and 17 mm
• Offset (bent) ring head geometry for improved access
• Ring (closed) ends for full-contact torque application
• Compact handheld form factor suitable for confined spaces
• Intended for use on metric hex nuts and bolts

How to use

Select the end sized to match the nut or bolt head (16 mm or 17 mm). Seat the ring fully over the fastener to ensure full-contact engagement. Use controlled, steady force to turn the spanner in the required direction; apply reversal strokes as needed in confined spaces. Take care to maintain alignment between the spanner and the fastener to avoid rounding. For better leverage, position the thicker portion of the tool toward the direction where greater torque is needed.

Usage recommendations

Inspect the spanner and fastener surfaces before use; avoid using the tool on rounded or damaged fasteners. Use appropriate personal protective equipment such as gloves and eye protection when working on vehicles or machinery. Store the spanner in a tool roll or toolbox to protect the ring ends from deformation and to keep the working faces clean for reliable engagement.