Tool Box Storage Lid Gas Struts Pair – 350mm 300N – 10mm Ball Socket Ends – 4x Heavy Duty L Brackets
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Force: 300N per strut (300N total support)
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Extended Length: 350mm
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Stroke: 135mm
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End Type: 10mm Ball Socket (M6 Thread)
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Ball Size: 10mm (snap-on)
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Quantity: Supplied as a matched pair (2 gas struts)
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Brackets: Heavy-duty L brackets included
Suitable For
Designed for medium to heavy-duty toolbox and storage box lids, site boxes, van tool chests, workshop storage trunks and larger hinged lids requiring stronger lift assistance.
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Recommended Lid Depth (hinge to front edge): 450–700mm
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Suitable Lid Weight (lid only): 30–54kg (when using two struts)
Recommended Lid Weight & Installation Guidance
Force Rating: 300N per strut (300N total per pair)
Recommended Lid Weight: Suitable for lids approximately 30–54kg when installed correctly. Actual lifting performance depends on hinge position, lid material and mounting geometry.
Recommended Mounting Position:
- Install one strut on each side of the lid
- Mount approximately 20–30% down from the hinge on the lid panel
- Position the lower L bracket around 80–350mm below the top inside edge of the tool box/storage box frame (depending on internal depth)
- Ensure the strut is slightly compressed when fully closed to maintain correct preload tension
⚠ If the lid is heavier than 54kg, a higher force rating may be required. If the lid is lighter than 30kg, the struts may feel too strong.
🔧 Mounting Bracket Type – 4x L Bracket Kit
This kit includes 4x heavy-duty L brackets (90° angle brackets) and is recommended for:
- Tool boxes with reinforced internal frames
- Deep site boxes, van tool chests and workshop storage boxes
- Metal or heavy timber box frames with strong inner supports
- Hardwood, steel or composite lids
- Installations requiring extra mounting offset or clearance
⚠️ For standard flat-panel lids or minimal internal clearance, a mixed mounting kit (L + Flat brackets) may be more suitable.
💡 Not Sure Which to Choose?
- If your toolbox has a thick-framed lid or requires extra offset → choose 4x L Brackets.
- If your lid is flat and standard construction → choose 2x L + 2x Flat Combination.
Secure 10mm Ball Socket System
This 350mm 300N gas strut pair features a 10mm ball socket end designed to snap securely onto the included L brackets. The ball-and-socket articulation allows smooth movement during opening and closing, reducing stress on mounting points and improving long-term durability.
Smooth and Controlled Heavy-Duty Lid Support
With 300N force per strut (300N combined), these toolbox storage lid gas struts provide powerful lifting assistance and controlled closing performance. Ideal for heavier tool box lids where reliable, stable support is essential.
- Prevents sudden lid drops
- Improves user safety
- Reduces hinge strain
- Extends the toolbox and storage box lifespan
Key Features
- 10mm ball socket snap-on connection
- Heavy-duty steel L brackets included
- Durable finish suitable for workshop and indoor storage environments
- Matched pair for balanced lifting on both sides
- Ideal upgrade for heavy tool box and site boxes
- Designed specifically for tool boxes, storage chests and hinged storage lids
For optimal performance, ensure correct mounting position and compatibility with your lid size and weight before installation.
🛡️ AUTORCE Customer Assurance
- ✓ Quality-tested components
- ✓ 30-Day Returns on unused items
- ✓ Fast UK Dispatch
- ✓ Secure checkout & UK-based support
Order Today and upgrade your tool box lid with a reliable 350mm 300N heavy-duty lift support.
