What people love (and don’t love)
What people love
- Strong and durable for small diameter bits, suitable for model making and detailed work.
- Performs well on hardened metal, stainless steel, cast iron, wood, and plastic.
- Good value for the price with many users satisfied with quality.
- Capable of drilling many holes without sharpening.
- Sharp and strong enough for hand-drilling pilot holes in 3D printed parts.
What people don’t love
- Some bits can break quickly under heavy use.
- Bits are very small, which may not fit all rotary tools; measurements should be checked before purchase.
- A few users found the bits weak or fragile in certain situations.
Strong and sharp drill bits ideal for small precision tasks, but handle with care for tougher jobs.
Summary based on customer review evidence.
Quick facts
- Brand: FiLwW
- Price: USD 26.99
- Rating: 4.40 (81 reviews)
If you regularly drill stainless steel, cast iron, or other harder metals, a cobalt HSS bit set can be a smart upgrade over standard bits. This FiLwW 10-piece kit includes ten matching 3/8″ jobber-length bits made from M35 high-speed steel with cobalt, designed to hold up under higher-heat drilling and continue cutting efficiently.
You can view the current price and full details on Amazon here.
The set uses a straight shank and spiral flutes, making it a practical choice for general shop work, repairs, and maintenance—especially when you want consistent results from bit to bit. It’s also suitable for non-metal materials like wood and plastic when your project calls for a 3/8″ hole.
- 10-piece set of 3/8″ (0.38″) jobber-length drill bits
- M35 high-speed steel with cobalt construction for wear resistance and thermal stability
- Spiral flute, 2-flute design for drilling performance
- Straight shank for broad drill compatibility
- Surface recommendations include metal, stainless steel, plastic, and wood
What you get: 10 total pieces in one set (FiLwW). If you have questions during use, the brand notes support is available and aims to respond within 24 hours.
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