Tough Build, Heavy Duty: Our stair climbing cart is crafted from a sturdy integrated carbon steel frame, ensuring stability and strength for heavy loads. It handles 280 lbs on flat surfaces and 180 lbs on stairs with ease. Ideal for diverse household and business applications, it's your reliable solution for demanding tasks. Effortless Mobility Revolution: Transform your perception of wheeled transportation! Our stair climbing cart features robust 6 plastic wheels (3.94" O.D.) designed for stairs and 4 versatile PP wheels (1.57" O.D.) for smooth ground movement. Effortlessly convey items up and down stairs, as well as across various terrains grass, bricks, concrete, and solid stairs (not suitable for hollow wood). It's your versatile solution for seamless maneuvering anywhere! Comfortable & Adjustable Handle: Our stair climbing dolly boasts an ergonomic loop handle with a plastic grip for effortless pushing and pulling.