This product is the BRUSHED BRASS Privacy Snib lock which can be paired with the: Mucheln Edge Series Handles This can be purchased as a set which includes both the Mucheln Edge handles and privacy lock,  here

Designed for bathroom or bedroom doors, where you require a snib to lock the door from the inside. On the outside is an emergency release.

Rose diameter: 50mm

Backset: 60mm

Includes privacy snib, bolt lock, brass strikers and brass screws.

Installation instructions, click here