b'GAS ORIFICE GAUGING DRILLSDRILL AND HANDLE ARE PERMANENTLY BONDED DRILL NUMBER IS STAMPED ON HANDLEB.T.U. / Hr. B.T.U. / Hr. B.T.U. / Hr. B.T.U. / Hr. B.T.U. / Hr. B.T.U. / Hr.DRILL NATURAL NATURAL LP DRILL NATURAL NATURAL LPPART No. SIZE (3.5) (7.0) (11.0) PART No. SIZE (3.5) (7.0) (11.0)D42 0.0935 22197 31391 61067 D60 0.0400 4062 5745 11176D43 0.0890 20111 28442 55331 D66 0.0330 2765 3910 7607D44 0.0860 18778 26557 51663 D67 0.0320 2600 3677 7153D45 0.0820 170722414446969 D69 0.0292 2165 3062 5956D46 0.0810 166582355845831D70 0.0280 1991 2815 5476D47 0.0785 15646 22127 43045 D71 0.0260 1716 2427 4722D49 0.0730 13530 19135 37225 D72 0.0250 1587 2244 4366D51 0.0670 11398 16119 31357 D73 0.0240 1462 2068 4024D52 0.0635 10238 14479 28167 D74 0.0225 1285 1818 3536D53 0.0595 8989 12712 24730 D75 0.0210 1120 1583 3081D54 0.0550 7680 10862 21131 D76 0.0200 1016 1436 2794D55 0.0520 6865 9709 18888 D77 0.0180 823 1163 2263D56 0.0465 5490 7764 15104 D78 0.0160 650 919 1788D57 0.0430 4695 6639 12916 D79 0.0145 534 755 1469D58 0.0420 4479 6334 12322 D80 0.0135 463 654 1273GAUGING DRILLS SETSDS2Gauging drill sets come in a durable heavy gaugeplastic case that has a tight clasp and features easydrill removement and snug replacement.PART No. Description Drill SizesDS2 Case With 42 Drills D40 Through D80DS3 Case With 42 Drills D19 Through D60DS4 Case With 21 Drills D19 Through D39DS5 Case With 21 Drills D60 Through D80J253'