7921 Mk Scarifier Drums Complete by Mk Scarifier Drums Complete 8″ Drum – Carbide 5 Point 84 cutters. 8″ Drum – Carbide 6 Point 78 cutters. 8″ Drum – Steel Sharp Tooth 18 Point 114 cutters. 8″ Drum – Steel Blunt Tooth 12 Point 114 cutters. . Posted in MK Diamond, MK Surface Preparation Tools, Shop by Brand