Got a double-hung or tilt window that won't stay locked shut? The tilt latches are probably broken. This WRS set is an easy and affordable fix. You get a pair of latches (left and right) in a durable black plastic housing. They're surface mount latches, which means they install on the top rail of the window sash. The dimensions are about 2-9/32 inches long, which is a common size, often referred to as a '2.5 inch' latch. They're spring-loaded, so they engage smoothly to hold the window sash securely in the frame and prevent it from tilting inwards when it's not supposed to. Replacing them is usually a simple DIY job: you just remove the old, broken latches (often just a couple of screws) and install these new ones in the same position. It instantly restores the security and proper function of your window. Before ordering, it's always a good idea to measure your old latches to make sure these will fit, but this 2.5\ size is one of the most common. A quick fix that makes a big difference in how your windows work!