KleinĀ® offers innovative solutions for different types of customers: craftsmen and carpenters, small companies and large industries. Our top-of-the-range ExtraboreĀ® drills are coated with our special KleinDIAĀ® DLC treatment, which allows the drills to last up to 4 times longer than uncoated drills. The KleinDIAĀ® treatment makes the swarf flow better during machining and significantly reduces the friction produced by the tool, even at intense work rates ExtraboreĀ® drills work