ERA Fortress BS3621 High Security Euro Cylinder Sashlock

The Era British Standard BS3621 Sash Lock is available in Satin Chrome or Polished Brass, and comes complete with a double euro cylinder, allowing for locking via key from both sides of the door. this is especially relevant for entrance doors so if you're looking for an insurance-approved front door lock, this may be just the thing you need! 

The supplied cylinder is a high security 6 pin ERA cylinder, and the lock body itself offers anti-drill plates on both sides, as well as hardened steel laminated anti-saw bolts in the deadbolt for additional security.

Since these are supplied with Euro escutcheons as part of the British Standard setup; we'd recommend going for some lever-on-rose door handles - sometimes known as 'floating door handles' which we have a great range of here:

https://www.locksonline.co.uk/Door-Handles/LocksOnline-Current-Door-Furniture-Range/LocksOnline-Lever-on-Rose-Door-Handles.html

The size of the locks are 

For the 2.5 inch version, back-set 44 mm, bolt throw 20 mm, case depth 64 mm, case height 109 mm, PZ (centers) 48 mm, Forend Length 162 mm, Forend width 26 mm, Spindle 8 mm, weight 1.2Kg 

For the 3 inch version, back-set 56 mm, bolt throw 20 mm, case depth 76 mm, case height 109 mm, PZ (centers) 48 mm, Forend Length 162 mm, Forend width 26 mm, Spindle 8 mm, weight 1.2Kg