Symmetrical cylinder

Call usMessage us on WhatsApp in your language

A symmetrical cylinder, “bombín simétrico” in Spanish, has both sides the same length measured from the fixing screw, for example 30x30 or 35x35. It is the most common format in shops and the one many doors come with as standard.

It fits well when the lock is centred in the thickness of the door and the escutcheons or plates are the same thickness on both faces.

The problem comes when it is replaced without measuring. If your door has a security escutcheon on the outside that is thicker than the one inside, a symmetrical cylinder may end up short on one side and long on the other, leaving the outer part more exposed.

Before replacing it, check that it protrudes the same amount outside and inside. If one side sticks out more than the other, you probably need an offset cylinder. We help you choose with our cylinder replacement service.

Related service

Lock cylinder replacement in Torrevieja

Made to measure lock cylinder replacement for lost or stolen keys, buying a home, a change of tenant or wear from the salt air.

Related terms

Questions that mention it

How do I know what size cylinder my door has?

It is measured from the centre of the fixing screw, on the edge of the door, to each end. If both sides are equal it is symmetrical; if not, it is offset. Read the full answer

Need a locksmith you can trust?

Spanish locksmiths from Torrevieja, born and raised here. You get a fixed quote before we start.

Call usMessage us on WhatsApp in your language
CallWhatsApp