A multi-purpose lightweight business ladder for any occasion such as: stair trolley, mobile trolley, take the ladder, take the book ladder, work ladder, OA office must have, all can be used. Widened tread design, solid structure, more stable for both feet to step on. The four wheels are silent, impact-resistant, non-marking and non-invasive floor, easy to move and durable, all four wheels have a brake function, safer to use, aluminum alloy material is light and easy to operate, making it a small helper in our lives.動容易堅固耐用，四輪皆有煞車功能，使用上更加安全，鋁合金材質操作輕巧方便，讓它成為我們生活中的一個小幫手。