AJK Locks have over 20 years experience in upvc window and door locks. Our Locksmiths in hemel hempstead service and replace multipoint locks and gearboxes throughout hertfordshire, buckinghamshire, middlesex and north london

whether your door is jammed or hard to lock our locksmiths in hemel hempstead will open and adjust the door hinges and replace the lock if required.

We also upgrade low level security locks to higher security multi-point locking systems and fitting an anti snap cylinder to prevent cylinder snapping which has become an easy access for burglars.

Our locksmiths in hemel hempstead carry replacement cylinders and gearboxes and can fix your door problems the same day. we also open jammed windows and replace the espag lock mechanisms and all of our work comes with a guaranteed. 

We Stock the most common replacement gearbox's on our vans, if we dont have yours we can almost guarantee a replacement the same day.

Our Upvc services

  • upvc gearbox's
  • upvc Multipoint locks
  • Anti Snap cylinders
  • Upcs sash jammers
  • Hinges
  • espag locks
  • espag window gearbox's
  • friction hinges
  • upvc window handles
  • window restrictors
Upvc gearbox and multi-point locking sytsems installed by AJK LOCKS
sash jammers fitted to upvc doors and windows by AJK LOCKS

 AJK Locks fit additional security to Upvc doors,

Have Sash Jammers fitted to both front and rear doors which provide security that a burglar cant attack.

Our Upvc locksmiths keep a wide range of locks on our vans, wether its a broken hinge, door dropped or your lock has failed the we can fix this for you.

Door and Window restrictors fitted by AJK LOCKS

Have a window/door restrictor fitted by one of our upvc locksmiths.

On those hot summer nights where you want to leave your bedroom windows open then have a key operated window restrictor fitted.

This will also give you peace of mind that a child can't open a window to wide and have an accident.

Upvc butt and flag hinges fitted by AJK LOCKS


When your door becomes difficult to open and lock, have our expert Upvc Locksmiths out to adjust your door / window before the locks fail and leave you locked in or out.

Upvc door locks have become a target over the years from burglars snapping hnadles and cylinders to gain access.

If your properety doesnt have anti snap cylinders then it's a method that can take under a minute to gain access which leaves your property vulnerable.

AJK Locks can advise you on wether your door mechanism needs upgrading and wether your cylinders need to be replaced to 3 star Anti snap cylinders.

Ultion 3 star anti snap cylinders fitted by AJK LOCKS

Have a 3 star Anti snap cylinder installed on your doors

We Can have the locks keyed alike for you to minimise keys making yoiur property more user friendly.

Upvc handles lockable by button fitted by AJK LOCKS

UPVC HANDLE replacements supplied and replaced by our Upvc Locksmiths.

lever / lever and Pad /lever handles finished in Gold, Polished Brass , Polished Chrome and Satin Chrome .

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