If placed on the sash instead of the window frame it, becomes a secure lock, preventing the opening of the window from "the outside; it may be equally well applied to the upper sash; it costs only ...

Application Locks for shops and entrance doors to private houses, industrial premises, offices or for any situation where a key operated deadlock is required plus a latch and lever handles. Available ...

The difference lies in the frame's outer edges. Casements are more energy efficient than sash windows because they close and lock tightly against the frame. Casement windows are an excellent ...