Separate lid with clip-lock handles Reinforced base and corners Stackable - lids feature integral location guides for non-slip stacking Made from impact resistant polypropylene These heavy-duty, stackable boxes are tough and durable. These heavy-duty, stackable boxes are tough and durable. Each size features a reinforced base and corners for strength and durability with a separate lid secured with strong, clip-lock handles. Suitable for storing a range of items from stationery and offce supplies to cleaning products and DIY tools.