ALL AITCHISON GRASSFARMER DRILLS PROVIDE EXCELLENT GERMINATION. INFINITELY VARIABLE GEARBOX HANDLES ALL SEED VOLUMES AND SIZES EFFORTLESSLY. RODENT STOP SLIDE MECHANISM. UNIQUE AITCHISON SLIM LINE CASTINGS AND INVERTED T-BOOT. LARGER 14"DISC COULTERS WITH A STRONGER AXLE DESIGN. STRONG 25mm TINES, DESIGNE FOR SUPERIOR TRASH CLEARANCE.