IIT 25730 Wood Spade Bit Set with 11.5-Inch Extension and Hex Key Ideal for producing smooth, deep holes in all kinds of wood, 8 PC Wood Flat Bits Size: 1/4-Inch, 3/8-Inch, 1 /2-Inch, 5/8-Inch, 3/4, 7/8-Inch, 1-Inch & 1-1/4-Inch Spade bits make crisp, clean holes through wood projects High carbon steel, heat treated Black coating increases wear resistance 11.5-Inch Bit extension allows drilling through larger projects