TRINITY Basics NSF certified wire shelving rack is perfect for any business, home, garage, or kitchen use. With a 250 lb weight capacity per shelf on feet levelers, it can hold your large, heavy boxes, big items, and everything in between. The shelf also comes with four wheels – 2 locking and 2 non-locking. The unit uses a slip-sleeve locking system that allows shelves to be adjusted in 1-inch increments. Assembly requires no tools.