Super pleased and just what was expected from a quality outfit like Irwin. I found the design of the drill bits especially useful in enlarging existing holes in addition to boring fresh new ones. Unlike many drills, these drills boar a clean, smooth hole with no burring. Used both on wood and steel with the same performance and through the various usages, no sign of wear or deterioration of the product. It maintains its sharpness without any distortion from friction.