Kane Detention's Security Plank Ceilings are high-security, interlocking systems that are designed for both new installations and retrofits.   Each plank is available in solid or perforated acoustical panels with concealed fasteners for added safety. Beyond the obvious high-level-security features, ease of installation is another key benefit of Kane Detention's Security Plank Ceiling.  All hardware and mounting rails are included to make the whole job quick and simple.  Custom shapes are also available for any application in galvannealed steel.   Ceilings are available with or without a top plate.