Open-end and box wrench Topex 16 mm model 35D388

Topex combined wrench 16 mm (model 35D388) is a hand tool with an open-end on one side and a box (ring) end on the other, designed for tightening and loosening hex nuts and bolts of 16 mm. The tool provides manual torque transfer through its opposing ends, combining quick access with the open jaw and a secure engagement with the closed ring end. Constructed for general maintenance, automotive and household repairs, it is intended for use where controlled, hand-applied force is required.

Advantages

The Topex combined wrench offers two functional ends in a single tool, enabling rapid switching between open-end access and ring-end grip without changing tools. The 16 mm size fits common metric fasteners used in automotive and machinery applications. Its design provides a balance of reach and leverage appropriate for manual tasks, while the ring end minimises cam-out and distributes force over more contact points to reduce fastener rounding. The compact form factor makes it convenient to carry in a toolbox or service kit.

Suitable for

• Tightening and loosening 16 mm hex nuts and bolts
• Automotive maintenance and repairs
• General household assembly and maintenance tasks
• Light to moderate machinery servicing
• Field service and mobile toolkits

Key specifications

• Type: Combined (open-end and box/ring) wrench
• Size: 16 mm working width
• Material: steel alloy suitable for hand tools (industrial finish)
• Ends: one open jaw end and one closed ring end for hex fasteners
• Drive: manual hand tool for direct torque application
• Typical use: maintenance, automotive, household repairs

How to use

Select the 16 mm Topex combined wrench and position the chosen end onto the hex fastener. Use the open-end for quick placement on partially obstructed or exposed nuts; use the ring end when maximum contact and reduced slippage are required. Apply steady, controlled hand force in the intended direction of rotation; avoid sudden impacts or excessive leverage beyond hand strength to prevent tool deformation or fastener damage. If additional torque is required, use an appropriately sized torque tool or a wrench rated for higher loads.

Usage recommendations

Inspect the wrench before each use for visible wear, cracks or rounded edges; do not use a damaged tool. Keep the contact surfaces clean and free of oil for secure grip. Store the wrench in a dry toolbox to reduce corrosion and maintain service life. For repetitive or high-torque applications, consider using a torque wrench or larger, impact-rated tools designed for those conditions.