Somta Extra Long Series Drill - HSS-E Parabolic Flute - 12.5mm x 375mmThe Somta Extra Long Series Drill HSS E Parabolic Flute, sized at 12. 5 mm diameter and 375 mm overall length, is purpose built for deep hole drilling where reach and hole quality matter most. This is a tool that doesnt just reach into the workpieceit maintains rigidity and precision all the way to the bottom, delivering dependable results in challenging setups. Why this drill stands out HSS E construction combines the toughness of high speed steel