Solid-State Drive cradle, but incorporates a port to securely hold the USB-SATA adapter too. I use a SSD as an inexpensive and light-weight external drive on my Macbook Air for travel. This cradle allows me to tape the drive and adapter as a single unit to my laptop without risk of damaging any connection point. M3*8 screws are optional to provide additional locking of the SSD to the cradle. TWO design versions provided, same functionality and dimensions.