The Multi-functional Movable Adjustable Base is a high performance products. You can put your dryer, washing machine and refrigerator on this Multi-functional base easily and safely. It has a maximum weight limit of 500lbs and is easy to assemble.It use button-type lock,not need screw.This adjustable dolly has rubber swivel wheels that make moving heavy objects a breeze, and the eight rear locking wheels ensure your furniture will not roll.◆Easily adjust the sturdy stainless steel bar to suit the larger furniture.◆Maintaining ventilation of the bottom, Anti-rust◆Effectively reduce the washing machine vibration and noise its maximum weight◆limit of 650 lbs◆Ultra-strong rigidness, press resistance and anti-corrosion◆Best quality and good material guaranteed!