Bullet_point: ['135-degree split-point angle is self-centering, reduces walking, good for hard material, and reduces pressure on cutting edges', 'Gold oxide, retains cutting fluid and prevent chip to tool welding', 'High speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances', 'Jobber-length drill bits is the most common length drill bit, suitable for a wide range of applications', 'NAS 907 type J standards, used in the aerospace industry']

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