DR-3D-N : DR-TWIST indexable square insert drills with coolant holes. Drilling depth 3xD.
COOLANT THROUGH TOOL 
  DesignationDD max LL1L4dD3ThGICATGIREMgiic
  DR120-036-16-04-3D-N 12.0012.4036.054.048.016.0020.00-3202321 0
  DR125-038-16-04-3D-N 12.5012.9038.055.548.016.0020.00-3202349 0
  DR130-039-16-04-3D-N 13.0013.4039.057.048.016.0020.00-3202340 0
  DR135-041-16-04-3D-N 13.5013.9041.058.548.016.0020.00-3202352 0
  DR140-042-20-05-3D-N 14.0016.8042.060.050.020.0025.00G1/4"3201313 0
  DR145-044-20-05-3D-N 14.5017.1043.561.550.020.0025.00G1/4"3201314 0
  DR150-045-20-05-3D-N 15.0017.4045.063.050.020.0025.00G1/4"3201315 0
  DR155-047-20-05-3D-N 15.5017.6046.564.550.020.0025.00G1/4"3201316 0
  DR160-048-20-05-3D-N 16.0017.8048.066.050.020.0025.00G1/4"3201317 0
  DR165-050-20-05-3D-N 16.5018.1049.567.550.020.0025.00G1/4"3201318 0
  DR170-051-20-05-3D-N 17.0018.3051.069.050.020.0025.00G1/4"3201319 0
  DR175-053-20-05-3D-N 17.5018.5052.570.550.020.0025.00G1/4"3201344 0
  DR180-054-25-06-3D-N 18.0020.3054.074.056.025.0032.00G3/8"3201345 0
  DR185-056-25-06-3D-N 18.5020.5055.575.556.025.0032.00G3/8"3201346 0
  DR190-057-25-06-3D-N 19.0020.8057.077.056.025.0032.00G3/8"3201347 0
  DR195-059-25-06-3D-N 19.5021.0058.578.556.025.0032.00G3/8"3201348 0
  DR200-060-25-06-3D-N 20.0021.3060.080.056.025.0032.00G3/8"3201349 0
  DR205-062-25-06-3D-N 20.5021.6061.581.556.025.0032.00G3/8"3201378 0
  DR210-063-25-07-3D-N 21.0024.5063.083.056.025.0032.00G3/8"3201379 0
  DR215-065-25-07-3D-N 21.5024.7064.584.556.025.0032.00G3/8"3201380 0
  DR220-066-25-07-3D-N 22.0025.0066.086.056.025.0032.00G3/8"3201381 0
  DR225-068-25-07-3D-N 22.5025.2067.587.556.025.0032.00G3/8"3201382 0
  DR230-069-25-07-3D-N 23.0025.5069.089.056.025.0032.00G3/8"3201383 0
  DR235-071-25-07-3D-N 23.5025.7070.590.556.025.0032.00G3/8"3201384 0
  DR240-072-25-07-3D-N 24.0026.0072.092.056.025.0032.00G3/8"3260071 0
  DR025-075-32-09-3D-N 25.0029.5075.0107.058.032.0042.00G1/2"3201824 0
  DR026-078-32-09-3D-N 26.0030.0078.0110.058.032.0042.00G1/2"3201825 0
  DR027-081-32-09-3D-N 27.0030.5081.0113.058.032.0042.00G1/2"3201826 0
  DR028-084-32-09-3D-N 28.0031.0084.0116.058.032.0042.00G1/2"3201827 0
  DR029-087-32-09-3D-N 29.0031.5087.0119.058.032.0042.00G1/2"3201828 0
  DR030-090-32-09-3D-N 30.0032.0090.0122.058.032.0042.00G1/2"3201829 0
  DR031-093-32-09-3D-N 31.0032.5093.0125.058.032.0042.00G1/2"3201830 0
  DR032-096-32-09-3D-N 32.0033.0096.0128.058.032.0042.00G1/2"3201831 0
  DR033-099-32-09-3D-N 33.0034.0099.0131.058.032.0042.00G1/2"3201832 0
  DR034-102-32-09-3D-N 34.0034.50102.0134.058.032.0042.00G1/2"3201833 0
  DR035-105-32-12-3D-N 35.0040.50105.0141.058.032.0050.00G1/2-143201834 0
  DR036-108-32-12-3D-N 36.0041.00108.0144.058.032.0050.00G1/2-143201835 0
  DR037-111-32-12-3D-N 37.0041.50111.0147.058.032.0050.00G1/2-143201836 0
  DR038-114-32-12-3D-N 38.0042.00114.0150.058.032.0050.00G1/2-143201837 0

Hole tolerance D+0.25/-0.05 in average conditions. However it can be higher or lower according to machine and tooling conditions.