Stair hand truck goes up and down stairs with three wheels on each side. Part#: ST-TRUCK-300|Wholesale Shipping, Trucking and Industrial Supplies
Amazon.com: Mount-It! Stair Climbing Dolly - 3 Wheel Stair Climbing Cart | Easily Lift Heavy Items Up and Down Steps | Holds 330 Pounds and Smoothly Rolls on Variety of Surfaces -
Dolly 3 WHEEL SLAB DOLLY FOR STONE SLABS OR GLASS – INStock Tools Supply