Milwaukee Thunderbolt pilot bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard pilot bit, which provides ultimate strength and protects against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A precision start, 135 split point tip starts on contact to keep the bit from walking for fast, accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.
Includes:
- Thunderbolt tapered web for added durability
- 135 split point provides accurate hole placement
- 3-flat shank won't slip in Arbor or chuck
- Parabolic flute clears chips faster
Includes:
- (1) Pilot Bit
- Weight: 0.05 LBS
- Width: 1.90 (in)
- Height: 0.25 (in)
- Depth: 5.70 (in)
Bit Diameter1/4 in.
Bit MaterialHigh Speed Steel
Bit TypeSpecialty
Length (in)3.5
Package Contents(1) Pilot Bit
Shank Diameter (in)0.25
Flute Length (in)2.0
Minimum Chuck Size Required1/4 in
Single / Double EndedSingle
Drill Bit Shank Design3-Flat
Recommended Safety EquipmentSafety Glasses
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- Weight: 0.05 LBS
- Width: 1.90 (in)
- Height: 0.25 (in)
- Depth: 5.70 (in)
- Dept: Accessories
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Milwaukee 49-56-8010 1/4 in. x 3-1/2 in. High Speed Steel Pilot Bit How would you rate this product?
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Dakota B. Verified Customer 
03-15-25 - canada
Jocelyn D. Verified Customer 03-12-25 - canada
Peter K. Verified Customer 03-10-25 - canada
David L. Verified Customer 03-09-25 - united states
