Hand threading tap set with straight flutes cuts threads in through holes and blind holes * Available in UNC (Unified Coarse), UNF (Unified Fine), or UNS (Unified Special) right-hand thread options for different applications * High-speed steel is compatible with a variety of materials * Uncoated (bright) tools have no additional surface treatment or coating, for use on a broad range of materials * Round shank with square end allows tap to be used in hand or power-driven applications