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The Versatility and Design of the Yale Lock

The Versatility and Design of the Yale Lock The design of the Yale lock makes it a popular choice with property owners and locksmiths alike. A Yale lock is commonly known as a pin tumbler lock. One of the reasons they are so popular with Locksmiths is that the internal cylinder can be changed without […]

How Vulnerable is the Yale Lock System?

How Vulnerable is the Yale Lock System? Every lock system is susceptible to breakage and security issues. Unfortunately, this is due to the pressures of forced entry that is prevalent in our society today. Forced entry activity is constantly testing the integrity of all lock systems. The Yale lock is no different and a lot […]

How Vulnerable are Euro Cylinder Locks?

Euro Cylinder locks can be vulnerable – but they are improving The popularity and history of the Euro Cylinder lock has been discussed in previous articles. In this article we look at the issues with the security of these locks. Euro Cylinder locks can be vulnerable. Susceptibility to lock picking and lock snapping are the […]

A Historical Look at Mortice Locks

We take a look at a brief history of the Mortice lock Mortice locks are not as popular nowadays as the Euro Cylinder or the Yale locks. Mortice locks were traditionally used in older buildings that were built before the advent of cylinder locks. They have enjoyed a bit of renaissance recently due to being […]

The Common Varieties of Mortice Lock

A Look at the Common Varieties of Mortice Locks Mortice locks are more widely used in the UK and Europe than overseas, and are mainly found on wooden doors, more so than uPVC doors. The Mortice lock, especially in the UK is sometimes referred to as a ‘Chubb’ lock. This is because Chubb have been […]

The Origins of the Yale Lock

The origins of the Yale lock Although the origins of the Yale Lock has a very British flavour, it was actually the Yale family in America who invented the Yale lock. Having already invented the Cylinder lock in 1848,  it was Linus Yale, Jr. who invented the pin tumbler lock in 1868, along with Henry R Towne. […]

Why Versatility is the Key to Success for Euro Cylinder Locks

Why Versatility is the Key to Success for Euro Cylinder Locks In this article we look at the versatility of Euro Cylinder locks. They are by far the most popular means of locking today’s modern homes and commercial buildings. They are very popular not only with door manufacturers but locksmiths as well because of this […]

The Security of Mortice locks

The security of Mortice locks Mortice locks are generally stronger and secure than a bored cylindrical lock. Ironically, installing a Mortice Lock initially can weaken the structure of a typical wooden door, but by choosing a 5 lever Mortice Lock your home will be more secure. Mortice locks are also very versatile and can accommodate […]

Security advice from your Sheffield locksmith

Stay up to date with the latest tips and security advice from Sheffield’s leading professional locksmith and to keep your home and business safe and secure.

About S Fretwell & Sons of Sheffield


We are a family business established in 1980, Stephen is DBS checked and a member of the Association of Accredited Locksmiths. We are a local company based in Sheffield.


Our customer reviews speak for themselves, we are often chosen by South Yorkshire Police, local schools and Sheffield Metropolitan Borough Council to secure their properties.


We were trained by Benny Wells at Safe Ventures, we never stop improving our skills and work with Sheffield home owners and businesses, helping to secure their properties.