What people love (and don’t love)
What people love
- Good value for the money with a useful variety of sizes included.
- Effective for drilling metals like bronze and stainless steel, especially with cutting oil.
- Bits perform well on medium hardness metals and woods.
- Positive seller responsiveness with quick refund offers for issues.
- Recommended for occasional jobs and repair tasks.
What people don’t love
- Some users reported short lifespan, with bits wearing out quickly after limited use.
- Quality control issues with irregular, blunt tips and incorrect sizing reported.
- Performance inconsistent on very hard materials like T-posts (80+ Rockwell hardness).
- Not suitable for heavy-duty or prolonged drilling on the hardest steels.
A good choice for light to medium tasks but may lack durability for heavy or continuous use.
Summary based on customer review evidence.
Quick facts
- Brand: DelitonGude
- Price: USD 12.99
- Rating: 4.40 (763 reviews)
The DelitonGude 1/8" M35 cobalt HSS twist drill bit set is built for drilling into tough materials where standard bits can struggle. Made from high-speed steel with 5% cobalt, these bits are designed for work on steels, cast iron, stainless steels, and other hard metals.
You can view the current price and full details on Amazon here.
Each bit features a 135° split point to help reduce walking and improve self-centering at the start of the hole. A spiral flute design helps move chips out efficiently, and the black oxide finish supports wear resistance for repeated use. This 10-pack is a practical pick for both DIY users and pros who want multiple identical bits on hand for maintenance, repair, and shop work.
What’s included: 10 pieces, 1/8" cutting diameter (0.13 in). Approx. 2.56 in overall length.
- M35 high-speed steel with 5% cobalt construction for drilling hard metals
- 1/8" (0.13 in) cutting diameter; 10-piece pack for backups and repeat jobs
- 135° split point helps self-center and reduce bit walking
- Spiral flute design supports chip removal while drilling
- Black oxide finish; straight shank for common drill/drill press setups
Note: The manufacturer recommends using a drill press and controlling RPM when drilling hard metal. Not for glass or ceramic materials.
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