Cart Parts Interior Shelf Keys PreviousInterior Shelf Next900 Series Assembly Bolts Interior Shelf Keys Interior Shelf Keys $20.00 (2) Cart Interior Shelf Keys.These locking keys are compatible with all 900 series carts. Color: Select Color White with White Core (903)Black (901, 902, 904, 905, 906) White with White Core (903) Black (901, 902, 904, 905, 906) Quantity: Add To Cart