What people love (and don’t love)
What people love
- Drills through tough metals like stainless steel and hardened metal with ease.
- Good value for an affordable cobalt drill bit set.
- Bits have two straight sides to prevent spinning in the drill chuck.
- Works well for drilling out studs, taps, and bolts in automotive applications.
- Maintains sharpness after multiple uses on hard steel.
What people don’t love
- Some bits out of the set may be dull or break easily.
- Not suitable for drilling tempered steel or very hard materials above Rockwell 45–55.
- Case quality is lighter duty than expected.
Great for general metal drilling but less effective on highly hardened or tempered steel.
Summary based on customer review evidence.
Quick facts
- Brand: WildBossy
- Price: USD 25.99
- Rating: 4.40 (701 reviews)
The WildBossy M35 Cobalt Drill Bit Set is designed for users who drill into harder materials and want a more durable upgrade from standard high-speed steel bits. Made from M35 cobalt steel (Co 5% HSS) and finished with a titanium surface, these jobber-length twist bits are built to cut faster and last longer than typical HSS bits.
You can view the current price and full details on Amazon here.
Each bit features a precise 135° split point to help reduce walking and start holes more accurately. The spiral flute design helps move chips out efficiently, while the 3-flat shank improves grip in the chuck—useful when drilling into stainless steel, steel, and cast iron. The set comes organized in an index-style plastic storage case to keep sizes easy to find.
Included sizes (20 pieces): 1/16×2, 5/64×2, 3/32×2, 7/64×2, 1/8×2, 9/64, 5/32, 11/64, 3/16×2, 7/32, 1/4, 5/16, 3/8, 1/2 inch.
Key features:
- M35 cobalt steel (Co 5% HSS) construction for tougher drilling applications
- 135° split point helps reduce walking and improves starting accuracy
- Titanium surface finish and fully ground twist design for smooth chip movement
- 3-flat shank for improved chuck grip
- Index storage case with 20 pieces covering 1/16″–1/2″ sizes
Recommended uses: stainless steel, cast iron, hardened steel, wood, plastic, and aluminum alloys. Not suitable for glass or ceramic. For best results, control drilling speed, pressure, and heat.
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