PROGRESSOR TOOTH DESIGN PROVIDES SUPERIOR PERFORMANCE IN SPEED AND CLEANLINESS OF CUT IDEAL FOR FAST AND CLEAN CUTS THROUGH THICK AND THIN WOOD GROUND TEETH FOR SUPERIOR SPEED AND CLEANLINESS AND TAPER GROUND BACKING FOR INCREASED BLADE LIFE TIP ENGINEERED FOR EASY PLUNGE CUTS HIGH-CARBON STEEL CONSTRUCTION FOR LONG LIFE IN WOOD 4-1/2 IN. OVERALL LENGTH, 3-17/32 IN. USABLE LENGTH 5 PIECE PACK