This is the Midwest Stand-In Portable Workstation.
For R/C planes, boats, and vehicles Three ways to support different models, fits virtually any design. Sliding uprights adjust to width of model (maximum distance between uprights is 16 in. (406mm). Cradles constructed of steel covered in protective rubber padding. Plastic parts tray features three compartments with slide-up ramps allows easy pick-up of parts. Easy no tools required assembly.
One Midwest Stand-In Portable Workstation with plastic parts tray