The Main Measurements You Shall Require:
Width of Case : 92mm
Height of Case : 70mm
Depth of Case : 27mm
Backset : 60mm

Yale 81 Rollerbolt Nightlatch Comes complete with Ring pull and 5 pin Rim Cylinder. This nightlatch is designed for the inside of your wooden door and to be unlocked using the Yale Rim cylinder from the outside of the door.

Specifications:
The Yale Rim Cylinder is high quality in either a Polished Brass or Chrome Finish. 
There are two keys supplied for the Rim Cylinder
Finish of the case is Dark Metallic Grey
Width of Case : 92mm
Height of Case : 70mm
Depth of Case : 27mm
Backset : 60mm
Handle Projected by 14mm