Grade 1 Knob Locks (Heaviest Duty)

Schlage

Heavy Duty Commercial Institution Knob Locks - Double Cylinder | Schlage D82PD

Schlage

Heavy Duty Commercial Classroom Security Knob Locks - Double Cylinder | Schlage D72PD

Schlage

Heavy Duty Commercial Store Knob Locks - Double Cylinder | Schlage D66PD

Schlage

Heavy Duty Commercial Vestibule Knob Locks - Double Cylinder | Schlage D60PD

Schlage

Heavy Duty Commercial Faculty Restroom Knob Locks | Schlage D85PD

Schlage

Heavy Duty Commercial Storeroom Knob Locks | Schlage D80PD

Schlage

Heavy Duty Commercial Corridor Knob Locks | Schlage D73PD

Schlage

Heavy Duty Commercial Classroom Knob Locks | Schlage D70PD

Schlage

Heavy Duty Commercial Entrance Knob Locks | Schlage D53PD

Schlage

Heavy Duty Commercial Single Dummy Knob | Schlage D170

Schlage

Heavy Duty Commercial Privacy/Hospital Knob Locks | Schlage D44S

Schlage

Heavy Duty Commercial Privacy Knob Locks | Schlage D40S

Schlage

Heavy Duty Commercial Exit Knob Locks | Schlage D25D

Schlage

Heavy Duty Commercial Passage Knob Set | Schlage D10S

PDQ

Cylindrical Locks - Grade 1 | PDQ SX Series