Padlocks Technical Advice Centre

This this our dedicated help, advice and testing results section for padlocks. Every time we get a good question from a customer, or asked to test a product, then we post the answer or results here. Use the list of Categories or the Search Box below to find the answer you're looking for. Don't worry you can get back to your basket our products by clicking our logo above.

We've also created a concise guide with the most commonly asked questions to download and print here:

How to lock a manhole cover with a padlock

We’ve been asked how it is possible to lock a manhole cover to a drain system or subway. There are some specialist locking manhole covers but they require some significant changes to the rim of the cover and the cover itself which can be shockingly expensive. The low cost or DIY way to achieve this […]

What type of chain for my closed shackle padlock?

You advise that a decent closed shackle padlock is needed for maximum security but it is impossible to get two chain links into a close shackle padlock. Does this mean that closed shackle lock are only any good for attaching to a bolt or a hasp and staple? It is true, a closed shackle padlock […]

What type / size bolt holds in a padlock cylinder?

The cylinder just dropped out of my padlock and the screw that retains the cylinder fell on the floor and I lost it. What size do I need to replace it? Answer: 5mm Countersunk M4 Bolt (in most padlocks) Occasionally we get questions on the bolt that holds a cylinder into a lock. This is […]

Is graphite powder a good lubricant for padlocks?

You published a video on YouTube for lubricating padlocks. You do not mention graphite powder. Do you recommend this? Dan Hunt, London Good question. Graphite powder is a good lubricant especially in cold weather as it works well to prevent a lock from freezing. However, in the UK it is very humid even when cold. […]

The shackle comes out of my lock, how can I prevent people from losing it?

If you buy a very good closed shackle padlock then the shackle itself will come fully out of the body when unlocked. This if because the guards or shrouds around the shackle (U Bar) must extend high enough, and all the way around, to prevent bolt cutters from accessing the shackle. As a result there […]

Can the shackle be completely removed from a Granit padlock?

We have bought a number of Granit Padlocks for shipping containers and they have lock boxes enclosing the padlock. Is it possible to remove the shackle to make it easier to fit the lock? Anonymous Customer Granit locks are very popular for shipping containers for this very reason. The lock uses a ball bearing to […]

What is the best lubricant for a padlock?

This is a very common question and often the mostly commonly used type, WD40, is the wrong choice. I’d be rich by now if I had £1 for every time a customer had told me their lock was still sticky only after a month of using WD40. The problem is that it simply drains out […]

My padlock needs to be locked to remove the key, how can I make it snap-shut and lock?

Many of the high security locks you can buy will be key retaining as standard. This means that when you unlock the padlock the key will be retaining within the lock body. This prevents you from walking away with the key whilst the lock is unlocked. This is a useful feature but often can be […]

How to prevent and remove superglue from a padlock?

Putting super glue into padlock is a common problem and 99% of the time it is local children causing mischief without appreciating the problems it can cause. Here are some tips on how to prevent it and how to deal with it if it does happen. Prevention 1. Soak in Diesel: The number one way […]

How Do I Prevent My Padlock Freezing?

Every year we get a number of enquiries asking for advice on dealing with this so here are a few hints and tips. Padlocks and the cold don’t go terribly well together. All padlocks, especially combination locks, use complex mechanisms with springs, pins and bars. These all expand and contract with a change in temperature and […]