E-IMAGE S-052 400*450mm Laptop Tray can hold a laptop which falls within the dimensions 17.7 x 15.7". A 3/8"threaded and a 1/4"threaded mounting hole on the bottom of the tray allows it to be mounted to tripods or other supports with 3/8"and 1/4"stud. A 5/8" adapter is included so you can mount the tray to light stands as well.