This Set Of Masonry Drill Bits Is Extra Sharp And Made To Use When You Need To Drill Into Extra Dense Surfaces, Such As Brick Or Concrete. The Set Includes A Carrying Case, To Help Keep Blades Sharp, And Sizes Are Clearly Marked To Help Keep You Organized. Set Includes Sizes 3,4,5,6,7,8,9, And 10 Straight Shank Suitable For Use With Most Drills Comes With Handy Storage Case