VEVOR Box Blade Shank, 46.4cm Scarifier Shank, 4 Holes Box Scraper Shank, Ripper Shank with Removable Tapered Teeth and Pins, Adjustable Shanks Assembly for Replacement, Digging, Plowing, 4PCSProduct Features HASSLE FREE ASSEMBLY Shank Height 18". Shank Width: 8''. We provide a complete set of mounting fittings. The box blade can be easily attached to the tractor via the four point holes without any complicated procedure. ADJUSTABLE SHANK Hole Interval 1 1 2". Hole Diameter: 1 2''. Each shank has four position adjustment holes that pin to the reinforced frame for maximum efficiency. You could adjust it according to your specific needs.