Heavy Duty Tilt & Slider These Grade Blades feature 16” tall moldboards with 6” beveled and reversible heat treated cutting edges to ensure a long blade life. All models feature heavy duty wall tubular steel hitch frames. Designed to fit most standard and narrow category 1 tractor hitches. Each Ringo Grader Blade can rotate 360 degrees with 5 forward and 5 reverse indexing positions for push and pull applications and have tilt and offset capabilities along with jack stands for easy hitching and storage offset capabilities.