These are ideal for extending hard-to-reach USB ports, such as a USB cable. B. on the back of a computer case where access is restricted. accessible without adding unnecessary clutter. Speeds are excellent, there is no noticeable drop in transfer speeds when used with external USB drives compared to connecting directly to the USB 3 ports on the motherboard. The price is reasonable. Bring a few more than you think you'll need, they come in handy.