"Used it to replace a conventional latch on an internal door. No longer need to pull down any lever, just a push or a pull. Had attempted to use a cheaper 3 quid roller bolt but that was just dreadful. It was advertised as adjustable and did have an adjuster but seemed to adjust nothing. This one from Screwfix although a little more expensive, actually works. Adjustment is done using a simple screw and all the internals are visible so you can see the adjustment being made. Great Product."