Coulters 22" diameter Adjustable spring mounts Covering Attachments 6" coverboards 4" coverboards Shanks Parabolic shanks MRD (Minimum Residue Disturbance)  shanks No-till shanks Shank Mountings Shear Bolt Spring Reset Options NH3 or liquid fertilizer attachments (MRD or No-till shanks) NH3 and dry fertilizer attachments (MRD or No-till shanks) Row markers disc level'r™ Double disc berm build'rT Wheel-type berm tuck'r®