The Folding Shelf, No. KRA412GPWZ, from Snap-on is compatible with all of the company's KRA4000 and KRA5000 series roll cabs and KRSC430/46-series carts. Featuring a bracket that can slip over the raised lip of roll cab carts, the shelf's piano hinge easily folds down when not in use and can provide over 1' of extra workspace. Measuring 18.25" in length by 18" in width with a 1/4" rim to avoid losing small parts, this U.S.-made shelf is perfect for technicians with a flexible workspace. Features a lifetime warranty.