Open/Box Ratcheting Wrench STANLEY 16 mm model 4-89-941

The STANLEY Open/Box Ratcheting Wrench 16 mm (model 4-89-941) is a hand tool combining an open-end jaw and a ratcheting box end in a single compact design. It is intended for tightening and loosening bolts and nuts where a limited swing arc or repeated rotations are required. The wrench is designed to be used in workshops, garages, maintenance and construction settings where a compact ratchet action improves access and work speed.

Advantages

This ratcheting wrench provides the versatility of an open-end for quick placement on fasteners and a ratcheting box end for continuous turning without repositioning. Its compact combination reduces the number of tools needed on the job and facilitates work in confined spaces. The ratchet mechanism allows for efficient fastener engagement and incremental rotation, while the open end offers immediate grip for initial loosening or finishing torque where full access is available.

Suitable for

• Tightening and loosening metric bolts and nuts with a 16 mm head
• Maintenance and repair tasks in automotive and mechanical workshops
• Assembly and disassembly work on machinery and equipment in limited-access areas
• Construction and installation tasks requiring a compact ratcheting solution

Key specifications

• Wrench type: open-end and ratcheting box end combination
• Size: 16 mm across flats
• Ratcheting mechanism: built-in box end for continuous rotation without repositioning
• Construction: single-piece hand tool designed for manual operation
• Typical applications: mechanical fastening, maintenance, assembly and repair

How to use

Select the open/box ratcheting wrench and place the open end over the fastener for initial engagement or where quick placement is needed. For continuous turning in restricted swing areas, position the box end over the fastener and operate the ratcheting action by moving the handle back and forth; the ratchet mechanism will turn the fastener in one direction without removing the wrench. Use the open end for applying final torque or for working on fasteners where the box end cannot reach. Apply only manual force within comfortable limits and avoid using the wrench with impact tools or cheater bars unless the tool is specifically rated for such use.

Usage recommendations

Inspect the wrench before use for wear or damage to the jaws and ratchet. Keep the ratchet mechanism clean and, if specified by the manufacturer, apply light lubrication to maintain smooth operation. Use the correct 16 mm size to prevent rounding of fastener heads and store the tool in a dry place to limit corrosion.