Lockmaster Britain's best selling multi-point door locking system; the Lockmaster range covers an extremely wide range of applications and door materials including Aluminium, Timber, PVC and modern composite construction. 3 Deadbolt Lockmaster 4 Roller Cam Lockmaster 2 Hook with roller Lockmaster 2 Hook with roller Lockmaster Custodian 2 Hook Lockmaster 3 Hook Lockmaster 4 Hook & 2 Roller Lockmaster French Door Lockmaster North American Lockmaster