OGH1230 Features: * Made of heat treated heavy gage steel, machined and ground to close tolerances * Hole sizes and decimal equivalents are permanently etched on face * Number size drills 61 to 80 * Fractional size drills 1/16"" to 1/2"" x 64ths * Number size drills 1 to 60 * Material: Steel * Testing and approvals: * Meets government specifications