Lockwood Borelocks | Deadbolts A Borelock Deadbolt is fitted via two holes which are bored, perpendicular to one another, into the door. Lockwood 005 Double Cylinder Round DeadboltHigh security Deadbolt with LockAlert® and SafetyRelease™ Lockwood 005 Double Cylinder Square DeadboltHigh security Deadbolt with LockAlert® and SafetyRelease™ Lockwood Paradigm® Pull Handle Lockset - DeadboltDeadbolt version for an elegant entry. Lockwood Symmetry 7106 Single Cylinder DeadboltGeneral purpose single cylinder deadbolt. Lockwood Symmetry 7107 Double Cylinder DeadboltGeneral purpose double cylinder deadbolt.