1. Introduction
This manual provides essential instructions for the safe and effective use of your Sealey AP521 Cantilever Toolbox. Please read this manual thoroughly before initial use and retain it for future reference.
The Sealey AP521 is a traditional cantilever design toolbox featuring four tool trays and a central storage area, ideal for organizing and transporting various tools. Its robust metal construction ensures durability.

Figure 1: The Sealey AP521 Cantilever Toolbox in its closed position, showcasing its red finish and sturdy handle.
2. Setup
The Sealey AP521 Cantilever Toolbox comes pre-assembled and requires no complex setup. Follow these steps to prepare it for use:
- Unpacking: Carefully remove the toolbox from its packaging. Inspect for any signs of damage during transit.
- Initial Inspection: Ensure all moving parts, such as the cantilever arms and hinges, operate smoothly.
- Placement: Place the toolbox on a stable, flat surface before opening or loading tools.
3. Operating Instructions
This section details how to properly open, close, and utilize the storage compartments of your cantilever toolbox.
3.1 Opening the Toolbox
- Release Latch (if applicable): If a padlock is used (not included), unlock and remove it from the top flaps.
- Lift Handle: Grasp the central handle firmly.
- Open Cantilever Mechanism: Lift the handle upwards. The cantilever arms will extend, causing the four upper trays to spread outwards, revealing the central storage area below.

Figure 2: The toolbox in its open configuration, displaying the four cantilever trays and the main storage area.
3.2 Closing the Toolbox
- Clear Trays: Ensure no tools or items are obstructing the closing mechanism in any of the trays or the main compartment.
- Lower Handle: Gently push the central handle downwards. The cantilever arms will retract, bringing the upper trays back into their closed position over the central compartment.
- Secure: Ensure the top flaps align properly. For added security, a padlock (not included) can be inserted through the designated holes on the top flaps.

Figure 3: Side view of the closed toolbox, highlighting its compact form.
3.3 Loading Tools
- Utilize the four cantilever trays for smaller, frequently accessed tools.
- The large central compartment is suitable for bulkier items or less frequently used tools.
- Distribute weight evenly to maintain balance when carrying.
4. Maintenance
Regular maintenance ensures the longevity and optimal performance of your toolbox.
- Cleaning: Wipe down the exterior and interior surfaces with a damp cloth. Avoid abrasive cleaners that could damage the finish.
- Lubrication: Periodically apply a small amount of light lubricant to the cantilever hinges to ensure smooth operation.
- Storage: Store the toolbox in a dry environment to prevent rust, as it is not water resistant.
- Inspection: Regularly check for loose rivets or fasteners and tighten them if necessary.
5. Troubleshooting
This section addresses common issues you might encounter with your toolbox.
| Problem | Possible Cause | Solution |
|---|---|---|
| Toolbox difficult to open/close. | Hinges are stiff or dirty; tools obstructing mechanism. | Clean and lubricate hinges. Ensure no tools are blocking the cantilever action. |
| Trays do not extend fully. | Overloaded trays; obstruction. | Reduce load in trays. Check for any items preventing full extension. |
| Rust spots appearing. | Exposure to moisture. | Clean affected areas and apply rust-inhibiting paint if necessary. Store in a dry environment. |
6. Specifications
Detailed technical specifications for the Sealey AP521 Cantilever Toolbox.

Figure 4: Dimensional overview of the Sealey AP521 Cantilever Toolbox, indicating approximate measurements in centimeters.
- Model Number: AP521
- Overall Size (L x W x H): 530 x 210 x 220mm (approx. 20.87" x 8.27" x 8.66")
- Material: Metal
- Color: Red (common variant)
- Number of Trays: 4 (cantilever design)
- Item Weight: Approximately 8.23 pounds (3.73 kg)
- Water Resistance: Not Water Resistant
- Security Feature: Top flaps accept padlock (padlock not included)
- UPC: 791429384047
- GTIN: 05024209108942
7. Warranty Information
Sealey products are manufactured to high standards and are subject to a quality guarantee. This product typically comes with a 1-year warranty for spare part availability, as per EU regulations.
For specific warranty terms and conditions, please refer to the official Sealey warranty documentation or contact Sealey customer support.

Figure 5: Sealey 1 Year Guarantee information.
8. Customer Support
Should you require further assistance, spare parts, or have questions regarding your Sealey AP521 Cantilever Toolbox, please contact Sealey customer support through their official website or authorized distributors.
For the most up-to-date contact information, visit the official Sealey website: www.sealey.co.uk





