Sutton Tools Long Series Drills Blue Bullet. These Drill bits offer a longer flute and overall length than standard drill bits making them ideal for drilling deeper holes. Features a 118 Degree standard point for general purpose applications and a precision ground flute designed for fast chip removal. The blue finish is a ferric oxide surface coating which reduces chip build up on the cutting edge, reducing frictional drag, and therefore reducing heat generated. It greatly increases drilling life and ability, especially in ferrous materials such as steel, stainless steels, high tensile steel, alloy and tool steel.