What people love (and don’t love)
What people love
- Effective on stainless steel and other hard metals when used with cutting oil.
- Sharp and good value for the price, often lasting through multiple jobs.
- Recommended for various metal drilling tasks, including bronze and steel studs.
- Seller is responsive and offers good customer support.
- Works well for precise jobs like installing cabinet pulls without wandering.
What people don’t love
- Some bits wear out quickly, sometimes after just one use.
- Not always durable on very hard materials like T-posts with high hardness ratings.
- Possible mix-up in sizing labeling reported by one buyer.
Good value cobalt drill bits that perform well on hard metals, but durability can vary depending on material hardness.
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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