SCREWS INCLUDE AND HEAVY DUTY:360 degree rotation to facilitate rotation at any angle,Heavy duty: can withstand a single 450lb, a total of 1800lb weight
SAFETY:The 4 wheels have brakes,ensuring the safety of people and goods at any time and at any angle
CAPACITY:550lbs each. Plate Size:3.74" (95mm) x 2.6" (66mm).Hole center to hole center:2.93" (74.5mm) x 1.8" (45mm). Mounting hole dimensions: 0.33" (8.5mm) x 0.46" (11.9mm)