They cover a wide adjustment range. Example listings include bars that extend from 14.25" to 37" and others that adjust roughly from 19" up to 51".
Materials shown include steel, heavy-duty iron, various plastics (for housings and bodies), and other metal components.
Vent locks are described primarily for double-hung windows, and some listings note compatibility with awning and casement-style hardware. Multipoint casement locks are used in casement window systems.
Compact T-locks and small cam locks are sized to fit into window channels and tracks. They typically have plastic housings with a metal cam or T-shaped top that aligns and rotates within tilt or sash assemblies.
Reported finishes include white and oil-rubbed bronze for some vent locks, beige plastic bodies for small components, and black or silver/chrome finishes for heavy-duty security bars.
Several bars include child‑proof locking and anti-lift components or dedicated anti-lift locks. Some listings also describe height or notched tip designs intended to prevent children from opening sliding doors.
Some heavy-duty security bars list rated resistance figures as examples, such as 350 lbs or 250 lbs of force.
