What Is a Cremone Bolt

: a fastening used on double doors and casement windows that has vertical rods moved up and down so that the ends of the bolts engage the top and bottom of the frame.

What is cremone hardware?

Cremone bolts are typically used on exterior french doors or windows. … Often rabbeted doors are used for a traditional detail. The geared action in the ‘cremone box’ was developed in France to allow two surface bolts to articulate locking or unlocking the door by using one lever or oval knob.

What is an espagnolette bolt?

An espagnolette is a locking device, normally mounted on the frame of a French door or casement window, with a handle or knob at about three of four feet above the floor which rotates a round bar with hooks at the ends into sockets at the head and sill of the opening.