ASEC Digital Door Lock AS3300 Series with Turn Knob and Optional Holdback

Push the code. Turn the knob. You're in.

There's a particular kind of frustration that comes from managing a door that multiple people need access to — contractors, cleaners, family members, staff. Cutting and tracking keys is time-consuming, and when someone leaves, you have no real way of knowing whether your spare key has come back. The ASEC AS3300 Series Digital Door Lock with Turn Knob removes that problem entirely.

Change the code yourself, in seconds

The standout feature of the AS3300 Series is how effortlessly the code changes. You don't need to pull the lock off the door or call a locksmith. The reset happens on-door, in seconds, using the buttons that are already there. That alone makes this lock genuinely practical for rental properties, HMOs, offices, and busy households where access requirements shift over time.

With over 4,000 possible code combinations across 14 buttons, the risk of someone stumbling onto your code is negligible. And because codes can be changed quickly and without fuss, there's no excuse for leaving an old code active when it should have been retired.

A full lock, not just a keypad

Where this model steps up from a basic digital lock is in its integrated 6-pin key override cylinder. Three keys are included in the box, giving you a traditional backup for emergencies, letting in someone who doesn't know the code, or simply having the peace of mind that you're never locked out if something goes wrong. It's the best of both worlds — keyless convenience day-to-day, with a physical key option when you need it.

The 60mm anti-thrust latch is worth a mention too. Unlike a standard latch, the anti-thrust design resists the kind of physical manipulation that an opportunist might attempt. It's a small detail that adds a meaningful layer of security.

Holdback when you need it

The optional holdback function lets you fix the latch in the retracted position, keeping the door open hands-free during deliveries, move-in days, maintenance visits, or busy commercial hours. When you're done, it releases cleanly back to normal operation.

Fits most standard doors without modification

The AS3300 is designed for timber doors between 35mm and 65mm thick, with an 8mm spindle and 60mm backset — dimensions that align with most UK door prep. The handing is fully reversible, so it works on both left-hand and right-hand hung doors without any adapters or adjustments. Rated for light-to-medium duty use on both internal and external doors, it's a versatile fit for residential and light commercial applications.

The Satin Chrome finish on the turn knob gives the lock a clean, modern look that complements timber, UPVC, and composite doors alike — and it wears well without the fingerprint issues of a polished finish.

Backed by a 5-year guarantee from ASEC.

This lock suits:

• Front and back doors on residential properties
• Rental properties, HMOs, and holiday lets
• Office and commercial internal doors
• Any door where you need keyless access with a physical key backup

In the box: ASEC AS3300 lock body, turn knob, 60mm anti-thrust latch, strike plate, and 3 keys.

Backset     60mm
Case Depth Required     85mm
Door Thickness     35mm to 65mm
Width     41mm