TSS British Standard BS3621:2007 5 lever mortice sashlock. Easily reversible latch bolt, no need to open lock case. The case has black powder coating with rounded rounded forend with squarefaceplate. The box strike is colour matched to faceplate for an aesthetically pleasing appearance. Anti-drill hardened plate fitted to the case to provide additional protection from attack. Deadbolt features hardened anti-saw rollers to provide a higher level of security. 
 
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Measurements
Faceplate: 162mm x 25mm
Backset: 45/57mm
Case height: 109mm
Case depth: 68mm (2.5) or 81mm (3)
Bolt throw: 20mm
Case thickness: 14mm
Centres: 57mm
Supplied with 3 keys