Cobalt Drill Bit 21/64 In By 4-5/8 In For High Temp Use Up To 1100F, Thick Web For Stability In Tough Materials, Surface Hardened For Abrasives, Jobber Length Full Shank, Great For Drilling Light Gauge Metal

Cobalt drill bit 21/64 in x 4-5/8 in for hard metals
✔️ 1-piece pack, cobalt drill bit, 21/64 in dia x 4-5/8 in length

This cobalt drill bit is designed for drilling into hard metals such as stainless steel, titanium, cast iron, aluminum alloys, and high-carbon steels. It features a thick web design and a split-point that starts on contact with no walking, ideal for shop and fabrication work.

✅ Diameter 21/64 in (8.33 mm); Length 4-5/8 in (117.5 mm); Jobber length, full shank
✅ Split-point starts on contact, no center punch required
✅ Heat-resistant up to 1100°F (593°C); surface hardened for tough metals
✅ Best used for drilling light-gauge metal, high-carbon steel, aluminum, alloy steel, cast iron, stainless steel, and titanium

💡 What is a cobalt drill bit used for when drilling hard metals? Handy for metalworking in tough materials. - Excellent for hard metals like stainless steel, titanium, and cast iron - Useful in applications requiring high heat resistance and durability - Features split-point for starting accuracy and reduced walking - Best used with slower speeds and appropriate lubrication