Lockable Snap Frames & Poster Cases
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UK's Trusted Display and Signage Supplier · Since 1978
Lockable Poster Cases and
Tamper-Proof Snap Frames
Lockable snap frames and poster cases prevent unauthorised access to poster inserts in public spaces. Two locking mechanisms: sequential Allen key locking where each frame edge must be unlocked individually in sequence, and screw-lock systems where a supplied Allen key releases a hidden fastener. Outdoor waterproof versions add rubber gasket seals rated IP55 and polycarbonate glazing for permanent external installation. Available A4 to A0 in silver and black. 32mm reinforced aluminium profile. Screws and wall plugs supplied; adhesive fixing not recommended in public positions.
Standard snap frames open by hand in seconds, which is the feature that makes them fast to update but unsuitable for public corridors, school halls, and outdoor positions where unauthorised removal of notices is a routine problem. Lockable frames provide identical front-loading poster access using a supplied Allen key while preventing any access to the poster without that tool.
Our most popular lockable frames include the A4 lockable silver snap frame, the A3 lockable version, and the A1 lockable snap frame. For outdoor wall-mounted display, our A2 lockable outdoor poster frame and A0 outdoor lockable poster case add rubber weatherproof seals for permanent external installation.
Tamperproof
Why Choose Lockable Snap Frames and Poster Cases
Sequential Allen Key Locking
Our lockable snap frames use either a sequential locking system (where each frame edge must be unlocked individually in the correct sequence before the frame can open) or a hidden Allen key screw fastener. Both mechanisms mean the frame cannot be opened by pressing the profile by hand, cannot be forced open without visible damage, and requires the supplied opening tool to access the poster insert. The tool is not proprietary hardware; a standard Allen key of the matching size works.
Outdoor Weatherproof Versions with IP55 Seals
Our outdoor lockable poster cases add an internal rubber gasket seal around the full frame perimeter that creates a weatherproof barrier rated to IP55, providing protection against rain, dust, and condensation for permanent external installation. The glazing uses vandal-resistant polycarbonate rather than standard PVC, providing impact resistance against deliberate damage. Used for permanent outdoor menu display, public information boards, and external building wayfinding.
32mm Reinforced Aluminium Profile
Lockable frames use a 32mm reinforced aluminium profile regardless of size, wider and heavier than the 25mm profile used in standard indoor snap frames. The wider profile makes the frame edges harder to grip and pry without the correct tool, provides additional structural rigidity for outdoor frames exposed to wind loading, and gives the frame visual weight appropriate for public institutional environments where a robust professional appearance is part of the security deterrent.
Full Size Range A4 to A0
We stock lockable frames in all ISO sizes: A4 (210x297mm) for toilet inspection rotas, food hygiene certificates, and meeting room door signs, A3 and A2 for health and safety boards and wayfinding, and A1 for retail corridor promotions and cinema lobby display where the frame must resist tampering by members of the public.
Portrait and Landscape with Hidden Fixings
Lockable frames mount in portrait or landscape orientation. Pre-drilled fixing holes are hidden inside the frame profile and revealed when the frame is opened with the Allen key. For all public position installations, use the supplied screws and wall plugs rather than adhesive tape: a frame in a public corridor must resist deliberate pulling force that would separate an adhesive fix from the wall surface.
Silver and Black for Institutional and Modern Settings
Silver lockable frames are the standard for councils, NHS trusts, schools, universities, and transport hubs where the neutral professional finish suits all institutional interior schemes. Black lockable frames suit cinema lobbies, modern retail corridors, and contemporary commercial buildings where the black frame complements the interior aesthetic. Both use the same locking mechanism and 32mm profile.
Where Are Lockable Frames Used?
Indoor Tamperproof or Outdoor Weatherproof?
For indoor public corridors where tampering and unauthorised removal is the concern, choose indoor lockable snap frames with Allen key locking. For outdoor wall-mounted display exposed to rain, choose outdoor lockable poster cases with rubber gasket seals and vandal-resistant polycarbonate glazing. For outdoor positions with both weather and impact exposure, choose the outdoor case with IP55 rating.
For Schools, NHS, and Public Buildings
Our A4 silver lockable snap frame and A3 version are the standard for school corridors, NHS waiting areas, council offices, and university buildings where mandatory notices, fire escape maps, and health and safety information must remain permanently displayed and protected from student and public tampering. PO accepted from all public sector organisations on 30-day credit terms.
For Train Stations, Shopping Centres and Retail
Our A1 lockable snap frame in silver or black suits high-traffic retail corridors, shopping centre directories, and transport hub information boards where unauthorised poster removal and replacement is a known operational problem. The sequential locking mechanism prevents anyone from swapping advertising content without the managing organisation's knowledge and authorisation.
For Outdoor Walls and Building Exteriors
Our A2 lockable outdoor poster frame and A0 black outdoor poster case provide rubber-sealed, IP55-rated, polycarbonate-glazed enclosures for permanent outdoor poster display on building walls, entrance canopies, and external wayfinding positions that must withstand year-round UK weather and resist unauthorised access.
Public Sector Trusted:
The Displaysense Advantage
Displaysense is a trusted UK supplier with over 45 years of experience. We supply lockable frames to councils, NHS trusts, universities, and transport operators who depend on their compliance and information notices remaining in place and undamaged in public environments. Our lockable frames are rigorously tested to ensure the locking mechanism withstands the daily handling demands of busy public buildings while remaining quick to open and close by authorised staff.
Replacement Allen keys and opening tools are available separately. Purchase Orders accepted from all public sector organisations and registered businesses on 30-day credit terms. For the standard non-lockable snap frame range see our snap frames collection.
How to Choose
How does a lockable snap frame work?
What is the difference between a lockable snap frame and an outdoor poster case?
Are lockable frames suitable for outdoor use?
What colours are available in lockable snap frames?
Ready to Buy
Can I get replacement Allen keys or opening tools?
Do you accept Purchase Orders from schools and NHS trusts?
Why should I use screw fixing rather than adhesive for lockable frames?
Shop Lockable Poster Cases and Snap Frames
Designed in the UK. Built in our own factories worldwide. Delivered nationwide.
