Premium Quality Replacement PartTiller Tine SetFor Troy-Bilt Models:21A-643B011 (2007) Bronco RotoTillers21A-643B066 (2007) Bronco RotoTillers21A-643B711 (2006) Bronco RotoTillers21A-643B766 (2006) Bronco RotoTillers21A-643B766 (2007) Bronco RotoTillers21A-643C211 (2007) Bronco RotoTillers21A-643C266 (2007) Bronco RotoTillers21A-643C711 (2006) Bronco RotoTillers21A-643C766 (2006) Bronco RotoTillers21A-64M1011 (2008) Bronco RotoTillers21A-64M1066 (2008) Bronco RotoTillers21B-643B011 (2007) Bronco RotoTillers21B-643B066 (2007) Bronco RotoTillers21B-643B766 (2006) Bronco RotoTillers21B-643C211 (2007) Bronco RotoTillers21B-643C266 (2007) Bronco RotoTillersOrder Includes:1 x Tiller Tine Set | 1901118A 1901118Dimensions & Measurements :Length : 154mm | 6.0″Bolt Height : 37.5mm | 1.47″Bolt Length : 15mm | 0.59″**