If you're fitting a proper mortise setup and need something dependable, the Ebco Brass Zen Cylinder 70mm Key-Knob NB is built exactly for that kind of job. This is a 70mm euro profile cylinder meant for thicker wooden doors where a standard short barrel just won’t sit right. Here’s the thing — when you’re installing locks day in and day out, you quickly learn that cylinder length and machining quality make or break the feel of the whole door. This one turns clean, seats properly, and doesn’t give that gritty halfway-jammed rotation cheap cylinders often do.

What really stands out is the solid brass construction paired with a key-outside / knob-inside setup. That combo is practical in real homes — secure entry from outside, quick exit from inside without fumbling for keys. And that matters a lot on a job site when clients want safety plus convenience. The natural brass finish keeps things classic, not flashy, and it ages nicely instead of peeling or going patchy.

Key Features:

• 70mm Extended Cylinder - Fits thicker doors and deep mortise bodies without awkward protrusion.
• Key Outside / Knob Inside - Gives secure exterior locking with fast interior operation for everyday use.
• Solid Brass Body - Handles years of turning, weather exposure, and daily wear without cracking or deforming.
• 5-Pin Tumbler Mechanism - Provides dependable household security with smooth, predictable key action.
• Natural Brass Finish (NB) - Keeps a warm classic look while hiding scratches better than coated finishes.

Applications

This cylinder is ideal for residential main doors, bedroom privacy installations, and even light commercial interiors where you’re using a Zen-series mortise lock body. In practice, it’s especially useful when dealing with thicker solid wood shutters or decorative panel doors where shorter cylinders leave the escutcheon sitting wrong. Builders, carpenters, and hardware installers all run into that problem sooner or later — this length solves it cleanly.

Why Choose This Model

The bottom line is the Ebco Zen hardware platform is known among installers for consistent sizing and reliable machining. With this key-knob configuration, you’re getting a setup that homeowners actually prefer once they start using it — lock from outside, twist and go from inside. No drama, no sticking. And because the internal brass parts aren’t thin stampings, the rotation stays smooth long after cheaper cylinders start feeling loose or crunchy.

Technical Specifications Explained

• Cylinder Length – 70mm - Designed for thicker doors so the barrel aligns correctly with handles and escutcheons.
• Operation Type – Key x Knob - Allows keyed security outside while the interior knob enables quick unlocking.
• Material – Solid Brass - Means better corrosion resistance and longer service life in humid or outdoor-facing doors.
• Pin Configuration – 5 Pin - Offers standard residential protection with reliable everyday usability.
• Finish – Natural Brass - Gives a traditional hardware look that blends easily with most door fittings.

Who Should Buy This

If you’re a carpenter installing premium wooden doors, a contractor finishing residential interiors, or even a homeowner upgrading worn-out lock cylinders, this model makes solid sense. It’s not some fancy electronic system — just a well-made mechanical cylinder that does its job every single day without fuss.

And honestly, that’s what most doors need. If you want a dependable brass cylinder that fits properly, turns smoothly, and won’t embarrass you six months after installation, this one earns its place in the toolbox.