Home improvement security designed to protect outdoor assets, promising robust corrosion and attack resistance. Marine owners gain reassurance knowing locks withstand salty, wet conditions and continue to turn reliably. Is the Master Lock Heavy Duty Padlock the right level of security for your boat or gate?
⚡ At a Glance
- • Security Rating: High cut and pick resistance, dual ball bearing locking
- • Best for: Securing boats, gates and outdoor storage in marine conditions
- • Not ideal for: Situations that require an extra-long shackle or very compact locks
Laminated steel core and stainless steel body cover deliver weather resistant protection. A boron-carbide chrome plated shackle plus a 4-pin cylinder increase cut and pick resistance.
Corrosion-resistant protection – with stainless steel body cover
Stainless steel body cover and stainless top and bottom plates shield a laminated steel core, limiting salt and moisture contact. Chrome-plated octagonal boron-carbide shackle further reduces corrosion and surface degradation.
Long-term resistance to rust keeps internal parts moving and reduces seizure risk. Suitable for frequent exposure to marine spray.
High cut and pick resistance – thanks to boron-carbide shackle and 4-pin cylinder
Octagonal boron-carbide shackle offers high hardness that resists cutting and severe abrasion, while a 4-pin cylinder increases complexity for picking attempts. Chrome plating adds surface protection and durability.
Shackle hardness and cylinder design make unauthorised entry notably harder for common attack methods. Appropriate where stronger-than-average security is needed.
Strong physical defence – with dual ball bearing locking and covered keyway
Dual ball bearing locking secures the shackle at two points to resist prying and levering forces, while a covered keyway and shackle seals reduce water and grit ingress. The 51mm body and 10mm shackle diameter balance robustness with practical fit.
Resistance to prying attacks and reduced contamination improves longevity and reliability. Four supplied keys make access sharing straightforward.
✨ The 4 Key Reasons for Master Lock Heavy Duty Padlock
- Laminated steel core – Reduces deformation under heavy impact and cutting attempts
- Octagonal boron-carbide shackle – Offers extreme hardness, resisting bolt cutters and severe abrasion
- Dual ball bearing locking – Secures shackle at two points to resist prying attacks
- Covered keyway and shackle seals – Keeps water and grit out for reliable long-term operation
📋 Technical Details at a Glance
- Material: Laminated steel core with stainless steel body cover
- Body width: 51mm
- Shackle diameter: 10mm
- Shackle length: 25mm
- Shackle type: Octagonal boron-carbide chrome plated
❓ Frequently Asked Questions
Q: Is this padlock suitable for marine use?
A: Ideal to secure boats and gates in a marine environment, thanks to a stainless steel body cover, top and bottom plates, and shackle seals designed for weatherability.
Q: How resistant is it to cutting and picking?
A: High resistance comes from an octagonal boron-carbide chrome plated shackle and a 4-pin cylinder, combined with dual ball bearing locking for added pry resistance.
Q: How many keys are supplied and is there a warranty?
A: Four keys are included and a limited lifetime warranty is provided.
🏆 Our Verdict
Suitable for boat owners, gate installers and anyone needing a weatherproof, high-security padlock. The combination of a laminated steel core, stainless steel cover, boron-carbide shackle and dual bearing locking delivers durable corrosion resistance and strong physical defence. Although initial outlay may be higher than basic padlocks, long-term reliability and the limited lifetime warranty make it a sensible investment.
