Each set includes 12 complete units ( spring, pin, caps) to replace worn hardware, maintaining screen tension across multiple window without drilling or adhesives Perfect for securing screens on sliding window, patios door, or ventilation panel where cautious yet strong fastening is essential Secure your window screens with this tainless steel plunger latches, featuring strong 5 / 32 " x11 / 2 " pin and ABS caps for resistant, long service hold Crafted from erosion resistant steel and reinforced ABS caps, these small 39x4mm screen retainers secure smooth spring action and tool without installation Ideal for homeowners, renters, or enthusiasts search stable solution to stabilize loose or sagging window screens in residential or commercial space, Manufacturer: YINGhhh