The STK1160 Grabber driver is used for a USB video capture device that typically allows you to connect analog video sources (like a VHS player, camera, or other video equipment) to your computer via a USB interface. The "STK1160" is the chipset used in these devices, and the driver allows Windows to recognize the USB video capture hardware and properly interface with it.

When you plug in a STK1160 Grabber device (often marketed as a USB video capture card or video grabber) to your PC, the driver enables video input, so you can use it with applications like OBS Studio, VLC Media Player, or video editing software to capture or stream analog video.