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Top rated boring inserts
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Best overall
Accusize Industrial Tools HSS Drill Set 115 Piece
High-quality HSS drill bits in a comprehensive set, highly rated for durability and precision in metalworking.
- Wide size range
- Durable HSS material
- Precise drilling
- Case could be sturdier
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Best for metal
DEWALT Titanium Drill Bit Set 14-Piece
Titanium nitride coating for reduced friction and extended life, great for drilling into steel and other metals.
- Long-lasting coating
- Sharp out of box
- Good value
- Limited sizes in set
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Best premium
Norseman Magnum Super Premium Drill Bit Set 29-Piece
Industrial-grade high-speed steel with heavy-duty web for extra strength, ideal for professional use in tough materials.
- Very durable
- Excellent chip clearance
- Precise holes
- Pricey
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Best for stainless steel
Irwin Tools Cobalt Drill Bit Set 29-Piece
Cobalt steel alloy designed for drilling hard metals like stainless steel and cast iron, with 135° split point.
- Cuts hard metals
- Reduced walking
- Long life
- Bit small sizes may break
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Best budget pick
Chicago-Latrobe 550 Series Black Oxide Drill Bit Set 15-Piece
Black oxide finish for corrosion resistance and reduced friction, reliable for general purpose drilling at a low price.
- Affordable
- Good finish
- Works on wood and metal
- Not for extreme use
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Best precision
MITUTOYO 0-1" Outside Micrometer 103-137
High-precision micrometer with ratchet stop, widely used in machining for accurate measurements.
- Exceptional accuracy
- Smooth operation
- Trusted brand
- Expensive
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Best value
Vermont American Drill Bit Set 21-Piece
Economical set of HSS bits with 135° split point for easy starting, suitable for light to medium duty drilling.
- Very affordable
- Split point reduces walking
- Decent quality
- Not for heavy use
- Case may break
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Best heat resistance
Cle-Line Cobalt Drill Bit Set 13-Piece
Cobalt steel bits with heavy-duty web for high heat applications, ideal for drilling hard alloys and abrasive materials.
- Excellent heat resistance
- Stays sharp
- Good chip evacuation
- Small set size
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Best comprehensive
Norseman Premium Drill Bit Set 115-Piece
Large set of HSS bits with 135° split point and double flute, offering versatility for various drilling tasks.
- Complete set
- Sharp edges
- Great organization
- Case bulky
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Best cheap cobalt
Guuhouy Cobalt Drill Bit Set 10-Piece
Budget-friendly cobalt bits that perform well on stainless steel and other hard metals, decent for occasional use.
- Low price
- Cuts hard metals
- Good for hobbyists
- May break under heavy load
- Inconsistent finish