1/2" x 3-1/2", Stubby Spade Bit, For Clean Wood Hole Drilling In Tight Spaces, 3-1/2" Overall Length Makes This Stubby Spade Bit The Smallest In Its Class, Double Wing Spurs For Easy Hole Formation, Patented Cutting Edge For Fast, Easy, Wood Boring, 1/4'' Quick Change Hex Shank For Use In All Universal Quick Lok Extensions, Skin Carded Packaging.