ProX XS-UTL20W Utility Case Holds Chain Hoist 1/2" PlywoodProX XS UTL20W Utility Case Holds Chain Hoist 1 2" plywood w 4 x 4" Caster & Top Dishes Exterior: 20 x 20 x 17 inch Int: 2 section of 18x9x9 ProX XS UTL20W ATA Utility Flight Travel Heavy Duty Storage Road Case with 4x4" in casters 20 x 20 x 17" Exterior. This heavy duty ATA 300 Style Road Case is built to last a lifetime*, with its rugged 1 2" plywood construction and high quality materials and workmanship to give you the ultimate security for your