1/4 in. x 4 in. High-Speed Steel Pilot Bit

Milwaukee® Thunderbolt® pilot bits are engineered 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 ground 135º split point starts on contact to prevent 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.

• Thunderbolt® tapered web for added durability
• 135-degree split point provides accurate hole placement
• 3-flat shank won't slip in shaft or chuck
• Parabolic flute clears chips faster

• Height 6.4 mm 
• Width 6.4 mm 
• Length 101.6 mm 
• Weight 27.2 g 

• Shank Style Straight
• Bit Type Specialty
• Single / Double Ended Single
• Recommended Safety Equipment Safety Glasses
• Item Pilot Drill Bit
• For Use With Tool Milwaukee Hole Saws
• Set / Individual Individual
• Product Type Hole Saw Pilot Bit
• Drill Bit Type Hole Saw
• Fits Hole Saw Sizes All Sizes
• Bit Length 4
• Overall Length (in) 4
• Shank Design 3-Flat
• Shank Length (in) 3
• Flute Length (in) 2
• Pilot Drill Sizing 1/4 po dia. x 4 po L
• Bit Diameter 1/4 po
• Shank Diameter 1/4 po
• Shank Diameter Inches 0.25