Low-Lift Blade / John Deere M74449Pack Size:1John Deere M74449NHC 212-0186, Prime Line 7-06757John Deere LT170 series; Sabre 1338, 1438, 1538 and 1638 lawn and garden tractors with 38" decksLength: 19 1/2 ", Center Hole: 11/16 ", Outer Hole: 3/8 ", Center To Center: 4 ", Width: 2 1/2 ", Thickness: .203 "