VALYRIANTOOL 3Pcs 5/8-In Cobalt Drill Bits – HSSCO M35, 1/2-In Shank, 6-In OAL, 135° Split Point

Introducing the VALYRIANTOOL 3-piece cobalt drill bit set, designed for metalworking versatility. Crafted with M35 HSSCO high-speed steel and finished with a distinctive black and gold polish, these bits balance hardness and toughness to resist wear while maintaining a reliable cutting edge. The set features a 5/8 inch diameter and 6 inch overall length, offering reach for thicker materials, with a 1/2 inch reduced shank to boost compatibility with a wide range of toolholding systems. This combination of materials and finish aims to enhance lubricity and coolant retention near the cutting edge during use.

The 135-degree split point supports quick, accurate starts with minimal wandering, while the right-hand spiral design helps chip evacuation to reduce buildup inside the cut. When used in a typical clockwise operation, the geometry works with common drilling workflows to maintain control and predictability across multiple metals. This set is well suited for routine tasks in stainless steel, cast iron, zinc alloys, copper, and other common metalwork scenarios.

What you get and how it helps

• Three bits included: 5/8 inch diameter for standard holes, 6 inches long for reach, and a 1/2 inch reduced shank for broad compatibility.
• Balanced hardness and toughness to support longer tool life and cleaner entry under typical drilling conditions.
• Coolant-friendly surface with specialized pockets to help maintain edge efficiency during metal cutting.

Performance highlights and best-use scenarios

• Versatile across metals: suitable for stainless steel, cast iron, zinc alloys, copper, and other common alloys encountered in workshops.
• Centering and penetration: 135-degree point aims for quick, precise starts with minimal wandering.
• Chip control: spiral flute design reduces clogging and improves cutting efficiency when drilling through metal.

Tips for best results: use steady feed pressure, moderate speeds, and appropriate lubrication to maximize edge life. Store the bits in a dry, clean environment to preserve performance over time.