7 Piece Set Of 12" Brad Point Hole Drills, From 1/8" Up To 7/16" Each Is 12" Long, With Blade Area Up To The First Seven Inches 7 Piece set weighs 1 pound, 5.1 ounces- heavy duty and strong-fits most drills Sizes include 1/8, 3/16, 1/4, 5/16, 3/8, and 7/16 inches The two largest bits are 3/8 and 7/16 inches, but have tapered ends to 5/16 inch No need for center punch-the brad points get you started exactly in the center