MaxWorks 50562 multi-functional mobile dolly roller base for appliances and furniture is lightweight yet strong, easy-to-carry product constructed from stainless steel bars plus high strength plastic plate frames. It features 4 durable stainless steel bars to resist rust and corrosion, 4 strong rubber feet for additional support, and black non-slip triangular mats for added stability and reduce noise and vibration. The base is equipped with 360 degree 4x2 rubber swivel wheels or 8 locking swivel castors that effortlessly rolls on carpets, concrete, wood, or other flat surfaces for maximum maneuverability. In addition, it easily locks and unlock with a simple press and lift to ensure the dolly will not move unexpectedly. It is designed for supporting appliances and furnitures up to a load capacity of 400 lbs. The length and width of base is adjustable from 17” to 26-1/4”. Height from rubber feet adjusts from 3-1/2” to 4-9/10” for versatility that is suitable in transporting various appliances. Easy to assemble and easy to clean, the multi-functional mobile base is ideal for home, workshop, garage, office, and more.