Padlock Buying Guide: A Complete Security Checklist

Picking the right padlock is one of those decisions that feels small but really isn't. This padlock buying guide is here to make it straightforward, because the right choice gives you peace of mind and the wrong one tends to make itself known at the worst possible moment. Whether you're securing a shipping container or a garden shed, you'll know exactly what to look for by the end of this.  

The single biggest mistake people make is buying a padlock based on price alone. The second biggest? Buying one that looks tough but has never had to prove it. You know the type: chunky with a satisfying weight in the hand but an absolute pushover with a decent pair of bolt cutters. Before you spend a penny, ask yourself one honest question: what are you actually protecting, and from whom?

A combination padlock on a gym locker faces very different threats to a padlock on a shipping container. The risk level, the environment, and the value of what's inside all point to the same answer on which padlock you need. Knowing how to choose a padlock for your specific situation is the foundation everything else builds on, so let's start there.

Security Level: What Are You Up Against?

Not every padlock needs to stop a determined criminal with an angle grinder and a bad attitude. Sometimes a sturdy-looking lock on a low-risk door is genuinely all you need. That said, if you're securing commercial property, vehicles, or anything worth serious money, you want something with real resistance behind it, not just a shiny shell.

This is where CEN grading comes in. The Central European Norm grading system rates padlocks from Grade 1 to Grade 6 based on standardised resistance testing. Think of it as a scoring system for security that actually means something. It removes a lot of guesswork and makes comparing locks across brands meaningful rather than a game of marketing bingo.

Here's a quick breakdown of what each tier covers in practice:  

For most domestic uses, including garden gates, sheds, and garage side doors, a Grade 3 or 4 will do the job well. Anything with serious commercial or insurance implications should be Grade 5 or above. Browse CEN grade padlocks to find the right level for your setup.   

Does Your Insurer Have a Say?

Here's something that catches people out spectacularly: your contents or commercial insurance policy may specify a minimum padlock grade. If a claim is made and your padlock doesn't meet the stated requirement, the insurer can simply refuse to pay out. 

You'll have done everything right except the one thing that mattered, which is exactly as frustrating as it sounds.

Insurance-rated padlocks are specifically tested and certified to meet those requirements. Check your policy before you buy. It takes five minutes and could save you thousands.

Right, you know your security level, so now it’s time to pick the actual padlock. This padlock selection guide breaks down the main types and what they're each best suited to. 

If you're still asking what padlock do I need, the answer usually comes down to three things: where it's going, what it's securing, and how much exposure it'll face. 

A padlock that's perfect for one job can be completely wrong for another. That's not a flaw in the lock, it's just physics.  

Closed Shackle Padlocks

The shackle is the curved metal loop that passes through the hasp or chain. On a standard open shackle padlock, a big chunk of that loop sits exposed, which gives bolt cutters something to get excited about. 

A closed shackle padlock buries most of the shackle inside the padlock body, leaving very little for an attacker to grip. Less to grab means much less fun for the wrong person.

If your padlock sits on a door, container, or gate where the shackle is out in the open, a closed shackle design is the smarter choice. They're a staple for container security and anywhere the risk level is high.

If the lock is going outside on a gate, shed, storage unit, or fence, weather resistance isn't optional. This section of the padlock guide is all about outdoor use, because a padlock that seizes up after one soggy winter is a waste of money and a very specific kind of annoying. Picture yourself on a cold Tuesday morning, gate wide open, padlock completely seized, running late. We've all been there, and it’s extremely annoying.  

Weatherproof padlocks are built with sealed internal mechanisms and external treatments that fight off corrosion. Squire and Abus have developed nano-protection coatings that hold up well even in coastal areas or anywhere the weather seems to have made it personal.

Don't overlook the internals either. Brass and stainless steel components resist moisture far better than standard steel, and a padlock that still turns smoothly three years down the line is worth every extra pound spent upfront.

High Security Padlocks for Serious Applications

For protecting machinery or keeping a commercial site secure overnight, a high security padlock is the right call. The Centre for Retail Research estimates UK retail crime costs businesses over £1.9 billion annually, much of it preventable with better physical security.

These locks are built to resist cutting and forcing, but also picking and drilling, the more patient methods that a determined thief with time on their hands will try when the obvious approaches fail.

Mul-T-Lock padlocks sit at the top end of this category and represent the best padlock for security in most high-risk commercial settings. Their patented key profiles and precision engineering make unauthorised duplication genuinely difficult, and their reputation with police forces and government facilities speaks for itself.

This is where padlock buying gets a bit more strategic. 

No padlock selection guide is complete without covering keying, because it's the part most people skip until they're standing in a car park squinting at six identical-looking keys, trying to remember which one does what. 

If you're managing security across multiple gates, sheds, storage units, and containers, a different key for every lock is both a security risk and a daily test of patience.  

For the absolute highest level of key control, patented profiles (used in certain Squire and Mul-T-Lock ranges) go further still. Duplication requires the manufacturer's direct involvement, full stop.  

Sometimes a keyed padlock just isn't practical. Luggage and storage units with multiple users are the sort of situations where combination padlocks make total sense. There’s no key to lose down the back of the sofa, just a code that lives in your head (and ideally nowhere else).  

One thing worth saying plainly: a cheap combination padlock is surprisingly easy to bypass. If you're using one for anything beyond low-risk situations, go with a known brand and check the CEN rating. A four-digit code on a flimsy body is really just a suggestion.  

Any honest padlock guide will tell you that brand matters, and the brands stocked at Locks Direct are there because they've earned their place as the best of the best. Every one has passed testing and meets quality standards built up over 30 years in the business.  

Sterling round out the range with a strong selection of security products built for practical, no-fuss use. A trusted British brand with a long track record, particularly popular for general commercial and industrial applications.

Browse Sterling Collection

Before you click buy, run through these quick checks. Think of it as the practical end of this padlock buying guide: two minutes now versus a very frustrating situation later. 

• What's the threat level? Think about location, visibility, and the value of what's behind the lock.
• Does your insurance policy specify a CEN grade? Check this before anything else.
• Will the lock be outdoors? If yes, weatherproof construction is non-negotiable.
• What type of fitting are you securing? Measure the shackle clearance needed: open, closed, or long.
• Do you need key control? If multiple people need access, or key duplication is a concern, look at restricted or master keyed options.
• Is a combination lock more practical? Shared access often suits a combination padlock better than a keyed one.

For anything more involved, whether that's bulk orders or specific insurance requirements, the Locks Direct team is on freephone 0800 542 1264. The advice is free, and the recommendation will always be straight. Browse the full range at the Locks Direct padlocks hub and find exactly what you need.