BL2521 – Tubular latch & back to back knurled knob keypads

The BL2521 falls under our Codestar range, acting as a medium-heavy duty lock compared with the other BL2000 series. Fitted with a tubular latch, this is ideal for situations where a light duty lock simply won’t cut it. This particular variant comes with back to back keypads.



The BL2521 falls under our Codestar range of mechanical push button locks. Manufactured to the highest standard with premium components, these are typically made from stainless steel to guarantee longevity. Instead of the standard internal handle, this lock has back to back keypads, meaning a code is required to both enter and exit.

With both keypads being cycle tested to 100,000 cycles to show their durability, this lock represents the medium tier of small, mechanical keypad locks. Both keypads come with over 8,000 potential combinations that can be separate to each other due to individual coding chambers.

This lock comes with an anti-thrust tubular latch that comes in three different sizes: the 50mm, the 60mm and 70mm backsets.

The BL2521 is suited for wooden and composite doors both internally and sheltered external applications.

Additional information


Timber Door, Composite Door


Satin Stainless

Internal / External

Sheltered External


50mm tubular latch, 60mm tubular latch, 70mm tubular latch


Internal Office Door

Duty Rating

Medium duty

Latch type

Tubular latch

Handle Type

Knob turn