Adjustable spanner STANLEY 4-87-988 — adjustable wrench, 200 mm, max jaw 1.4 cm, black/yellow

Hook wrench STANLEY 8–14 mm, model 4-87-988, is a manual tool engineered to engage and turn round nuts, collars and fittings with smooth or recessed surfaces. The wrench covers fastening diameters from 8 to 14 mm and has a compact profile that facilitates access in confined spaces. It is intended for tasks where slotted, rounded or shoulder-type fasteners need adjustment without damaging surrounding components.

Advantages

The hook wrench provides secure engagement with smooth or recessed fasteners thanks to its precisely formed hook and contact surface. Its adjustable range from 8 to 14 mm eliminates the need for multiple fixed-size tools, reducing kit size. The compact head and short handle improve maneuverability in tight locations, and the solid metal construction ensures stable torque transmission for controlled turning of collars and retaining rings.

Suitable for

• Plumbing: adjusting pipe collars, coupling nuts and fittings in restricted spaces
• Machinery maintenance: turning round locknuts and bearing collars
• Assembly and repair: working with recessed or smooth fasteners on equipment
• Hobby and workshop tasks requiring non-damaging engagement of rounded fasteners

Key specifications

• Compatible fastening diameter range: 8–14 mm
• Tool type: adjustable hook wrench for round/recessed fasteners
• Profile: compact head for access in confined spaces
• Material: metal construction designed for torque transmission (steel)
• Intended use: manual operation for turning collars, round nuts and fittings

How to use

Select the wrench and position the hook so it fully engages the recess or edge of the round nut or collar. Apply steady, controlled force on the handle while maintaining full contact between the hook and the fastener to avoid slipping. For tightening, turn clockwise as appropriate; for loosening, turn counterclockwise. When working in confined spaces, ensure the wrench has enough clearance for the required rotation and re-seat the hook if it slips before continuing.

Usage recommendations

Use the tool only on fasteners within the 8–14 mm range and avoid excessive impact or hammering on the handle. Inspect the hook for wear before use and keep the engagement area clean of debris to maintain secure contact. For high-torque applications, consider using appropriate holding tools to support the assembly and prevent damage to the fastener or surrounding parts.