The CORE-BULK Quick Latch – Round Passage Latch 71mm (57mm Backset) Polished Chrome includes a round passage door latch mechanism designed for quick installation and ease of use. The kit features a sleek polished chrome finish that provides a reflective, mirror-like appearance, adding a touch of elegance to door hardware. Crafted for fast fitting, the installation requires simply drilling a 25mm hole, perfect for bolt-through fixings. In the package, the kit is supplied with both a round and rectangular strike box, along with dust boxes to keep the latch mechanism clean and free of debris. The door latch has been robustly tested to 20,000 cycles, indicating a durable and reliable build. This kit offers versatility with its availability in both passage and push-button privacy versions, although the accompanying image and text specifically mention the passage variant. The components are designed for a 57mm backset measurement, which refers to the distance from the edge of the door to the center of the latch mechanism.