The Triumph Twist Drill Co. Fractional Drill Bit features a 31/64 inch (0.4844") diameter in a standard jobber length design for versatile drilling applications.Triumph Twist Drill Co. Fractional Drill Bit31/64 inch diameter (0.4844 inches)Jobber length design for standard drilling depthFractional sizing for precise hole drillingProfessional-grade constructionIdeal for metalworking woodworking and general drilling tasks where precise 31/64 inch holes are required. The jobber length provides excellent balance between drilling depth and bit stability.