Shopping security
Designed for professionals working with tough metals, the 8.5MM Cobalt RED HELIX Twist Drill Bit delivers unmatched strength and performance. Its innovative variable helix features a steep 35° angle tapering to 15°, allowing fast chip evacuation while reducing heat buildup and maintaining sharpness. The QUAD EDGE 135° split-point tip provides precise starts without walking, ensuring accurate, clean holes every time. Four cutting edges produce smaller chips for quicker removal, prolonging the bit’s lifespan. Reinforced with an internal taper web, this drill resists breakage under high-stress conditions. With a cobalt coating, it offers exceptional durability, lasting up to 10 times longer than standard black oxide bits. Perfect for demanding industrial and workshop applications, it’s your go-to choice for efficient, long-lasting twist drilling.
1 × 8.5MM Cobalt RED HELIX Twist Drill Bit
| Specifications | Details |
|---|---|
| Drill Bit Diameter | 8.5MM |
| Material | Cobalt Steel |
| Coating | Cobalt |
| Tip Type | QUAD EDGE 135° Split Point |
| Helix Angle | Variable 35°–15° |
| Cutting Edges | 4 edges for faster chip removal |
| Internal Web | Reinforced taper for strength and breakage resistance |
| Lifespan | Up to 10× longer than Black Oxide bits |
| Ideal For | Hard metals, industrial and workshop applications |
Ships within 48 hours · Estimated delivery Sep 8 - Sep 13
US$40
Get nowSign up to your membership to get coupons up to
15%
Get nowOpportunity to enjoy order discount up to 15% off
Top-Converting Item to Boost Your Average Order