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Cobalt HSS Drill Bits, Wire Sizes R18CO - Cobalt HSS, Heavy Duty, *Bronze Color Oxide, 135° Split Point Drill Bits Made of heat resistant cobalt. Used for drilling in tough, high tensile strength materials like PH stainless steel, titanium and Inconel.                                                                                                                                                                                                                     *Surface treated flutes .1250 and over Diameter Number Decimal Equivalent Flute Length, Inch Overall Length, Inch Pkg Qty Price Pkg. R18CO EDP # Purchase Online 1 0.2280 2.6250 3.875 12 $101.04 46518301 Buy Now 2 0.2210 2.6250 3.875 12 $100.80 46518302 Buy Now 3 0.2130 2.5000 3.750 12 $94.32 46518303 Buy Now 4 0.2090 2.5000 3.750 12 $94.80 46518304 Buy Now 5 0.2055 2.5000 3.750 12 $94.80 46518305 Buy Now 6 0.2040 2.5000 3.750 12 $94.80 46518306 Buy Now 7 0.2010 2.4375 3.625 12 $73.44 46518307 Buy Now 8 0.1990 2.4375 3.625 12 $73.44 46518308 Buy Now 9 0.1960 2.4375 3.625 12 $73.44 46518309 Buy Now 10 0.1935 2.4375 3.625 12 $73.44 46518310 Buy Now 11 0.1910 2.3125 3.500 12 $73.44 46518311 Buy Now 12 0.1890 2.3125 3.500 12 $73.44 46518312 Buy Now 13 0.1850 2.3125 3.500 12 $70.32 46518313 Buy Now 14 0.1820 2.1870 3.375 12 $70.80 46518314 Buy Now 15 0.1800 2.1870 3.375 12 $70.80 46518315 Buy Now 16 0.1770 2.1870 3.375 12 $65.76 46518316 Buy Now 17 0.1730 2.1870 3.375 12 $64.80 46518317 Buy Now 18 0.1695 2.1250 3.250 12 $58.80 46518318 Buy Now 19 0.1660 2.1250 3.250 12 $56.88 46518319 Buy Now 20 0.1610 2.1250 3.250 12 $56.88 46518320 Buy Now 21 0.1590 2.1250 3.250 12 $56.64 46518321 Buy Now 22 0.1570 2.0000 3.125 12 $56.88 46518322 Buy Now 23 0.1540 2.0000 3.125 12 $56.88 46518323 Buy Now 24 0.1520 2.0000 3.125 12 $56.64 46518324 Buy Now 25 0.1495 1.8750 3.000 12 $51.60 46518325 Buy Now 26 0.1470 1.8750 3.000 12 $51.36 46518326 Buy Now 27 0.1440 1.8750 3.000 12 $51.12 46518327 Buy Now 28 0.1405 1.7500 2.875 12 $48.00 46518328 Buy Now 29 0.1360 1.7500 2.875 12 $46.80 46518329 Buy Now 30 0.1285 1.6250 2.750 12 $43.44 46518330 Buy Now 31 0.1200 1.6250 2.750 12 $43.20 46518331 Buy Now 32 0.1160 1.6250 2.750 12 $42.48 46518332 Buy Now 33 0.1130 1.5000 2.625 12 $40.56 46518333 Buy Now 34 0.1110 1.5000 2.625 12 $40.80 46518334 Buy Now 35 0.1100 1.5000 2.625 12 $40.56 46518335 Buy Now 36 0.1065 1.4375 2.500 12 $40.08 46518336 Buy Now 37 0.1040 1.4375 2.500 12 $40.08 46518337 Buy Now 38 0.1015 1.4375 2.500 12 $37.44 46518338 Buy Now 39 0.0995 1.3750 2.375 12 $37.44 46518339 Buy Now 40 0.0980 1.3750 2.375 12 $37.44 46518340 Buy Now 41 0.0960 1.3750 2.375 12 $36.96 46518341 Buy Now 42 0.0935 1.2500 2.250 12 $36.48 46518342 Buy Now 43 0.0890 1.2500 2.250 12 $36.48 46518343 Buy Now 44 0.0860 1.1250 2.125 12 $36.48 46518344 Buy Now 45 0.0820 1.1250 2.125 12 $36.48 46518345 Buy Now 46 0.0810 1.1250 2.125 12 $36.48 46518346 Buy Now 47 0.0785 1.0000 2.000 12 $36.48 46518347 Buy Now 48 0.0760 1.0000 2.000 12 $36.48 46518348 Buy Now 49 0.0730 1.0000 2.000 12 $36.48 46518349 Buy Now 50 0.0700 1.0000 2.000 12 $36.48 46518350 Buy Now 51 0.0670 1.0000 2.000 12 $36.48 46518351 Buy Now 52 0.0635 0.8750 1.875 12 $36.48 46518352 Buy Now 53 0.0595 0.8750 1.875 12 $40.56 46518353 Buy Now 54 0.0550 0.8750 1.875 12 $40.56 46518354 Buy Now 55 0.0520 0.8750 1.875 12 $40.56 46518355 Buy Now 56 0.0465 0.7500 1.750 12 $46.08 46518356 Buy Now 57 0.0430 0.7500 1.750 12 $46.08 46518357 Buy Now 58 0.0420 0.6875 1.625 12 $46.32 46518358 Buy Now 59 0.0410 0.6875 1.625 12 $46.08 46518359 Buy Now 60 0.0400 0.6875 1.625 12 $46.08 46518360 Buy Now