The Single Hung Auto Lock is designed to be compatible with most meeting rail grooves, making it versatile and easy to integrate into a variety of window styles. The lock's tongue thickness is intentionally thinner than that of a traditional sweep lock tongue, allowing it to better accommodate the pressure from the plunger, ensuring smooth and reliable operation. Additionally, this lock is designed as a drop-in replacement for sweep lock fabrications, which means it can be easily installed without requiring significant modifications to existing window frames.