The Triumph Twist Drill Co. Wire Gauge Drill Bit features a precision 0.0550 inch diameter with jobber length design for versatile drilling applications.Triumph Twist Drill Co. Wire Gauge Drill Bit54J wire gauge specification0.0550 inches (1.397mm) diameterJobber length for standard drilling depthProfessional grade constructionIdeal for precision drilling in metal wood and plastic materials where exact hole diameter is critical for professional and industrial applications.