ERA Invincible multipoint door lock gearboxes are very distinctive, with a square design and no corner cut-outs. The overall length of the gearbox is 221mm and the width is the backset plus 18mm.

Available in 30mm, 35mm, or 45mm backsets, all ERA gearboxes have the same dimensions. They can feature a classic deadbolt with either a standard euro cut out, an Invincible cylinder cut out, or a Vectis 5 lever mechanism. They can feature either a deadbolt or hook bolt (which throws upward). Look out for the British Standard Fortress gearbox which features hardened drill plates.

With the exception of the British Standard Fortress lock, all ERA gearboxes can be interchanged, so if your client needs a hook lock, instead of a deadbolt or Invincible locking multipoint door lock, contact us and we’ll build the lock to order.

ERA multipoint door lock gearboxes feature a 24mm high latch (with 2 distinctive screws in the latch), a 30mm high deadbolt, and 61mm between them. Gearboxes are held onto the faceplate with 4 screws, which is unusual for a multipoint door lock. The first screw hole to the second measures 37mm, the second to the third measures 85mm, and the third to the fourth screw measures 43mm.

When measuring the backset, allow 2-3mm for the faceplate, so a 35mm backset gearbox will measure 32mm when not fixed to the strip.

ERA Invincible gearboxes are designed to accept both standard euro cylinders and Invincible shaped cylinders.

We stock a range of associated products for ERA Invincible gearboxes, including multipoint door locks, keeps, spindles, handles and accessories.