Superior Steel SC8822 6 Inch x 4-1/2 Inch Square Clay Spade Round Hex/ Spline Hammer 19 Inch Long Shank Length: 4-5/8 inch | Shank: Spline Blade Length: 5-5/8 inch | Blade Width: 4-1/2 inch Hex Diameter: 5/8 inch | Hex Length: 3-1/4 inch Hex Width: 3/4 inch | Overall Length: 19 inch Steel Type: 42 Cr Mo | Hardness: 50+-3 | Heat Treated: Yes