WIDIA™ TOP DRILL™ Deep-Hole Drills Customisation Diameters • Intermediate sizes, even up to 16mm diameter, available as semi-standards. Lengths • Length variations, including longer versions up to 550mm depending on diameter, available as custom solutions. Material-Specifi c • For drilling non-ferrous materials, sharp and uncoated versions are recommended and available as custom solutions. Consult the custom solutions department for specific applications.