This Nonslip Tripod Shelf for Laptops & Projectors from Kupo provides a secure and stable mounting shelf designed to fit on tripods and light stands. An industry-standard 1/4"-20 thread allows the shelf to securely attach to your stand or tripod, and the included nonslip pad ensures that your laptop or projector will stay put while in use. The shelf's magnesium-aluminum alloy construction keeps the shelf weight down to just over 2 lb while providing a maximum load capacity of 44 lb.