Description 4" Scraper Blade. For Landoll 7410 VT and 8530 Disc Harrow. Mounts With 2 Carriage Bolts 1/2"-13 x 1-1/4" and Lock Nuts (not included). Replaces 151550. This item is a suitable alternative for the following: 864-SMA151550, 151550, D-16042