Lazer Spade Bits advanced cutting design features arched shaped cutting spurs that define the hole, remove the chip and increase cutting speeds. Heavy duty, single construction shank provides added stability; eliminates wobble. Made from premium quality hardened steel, remains sharper longer and increases tool life. 6 Piece Set includes 3/8-Inch, 1/2-Inch, 5/8-inch, 3/4-Inch, 7/8-Inch and 1-inch lazer spade bits.