Best Extra Long Drill Bits Under $100 (2026)
We ranked products by value score using price (under $100), user ratings, material (HSS or equivalent), available lengths, and brand reliability
This roundup covers extra long drill bits suitable for deep-hole and hard-to-reach drilling tasks, focusing on options priced under $100 and evaluated for value. Picks were chosen by comparing shaft length, material (HSS vs. cobalt variants), brand reputation, user ratings, and cost-effectiveness across the listed products
Top Picks
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1
BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3)
Aircraft black oxide drill bit with speed helix for faster drilling in light-gauge metal, wood, and plastic. Per-pack info; longer life and reduced heat. One customer notes good quality and length enough to drill through walls
- faster drilling
- longer bit life
- versatile for metal, wood, plastic
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2
1/2 in x 10 in extra length drill bit (DWDDL series)
High-speed steel drill bit with extra length for reach and black oxide finish for lubricity. Customers note sharpness and long flute length, with mixed durability feedback
- extra length for reach
- black oxide lubrication
- round shank versatility
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3
DWDDL18X1/8 1/8" x 18" High Speed Steel Drill Bit
High-speed steel drill bit with extra length for reach. Durable with wear resistance and good cutting performance; some users report issues with durability and straightness
- extra long reach for drilling
- black oxide for lubricity
- round shank for broad compatibility
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4
27/64" x 18" high speed steel drill bit, extra long DWDDL
High-speed steel drill bit with extra length for reach. Provides hardness and toughness with lubricity from black oxide coating. Customers note sharpness and long flute length, with mixed durability feedback
- extra-long reach
- black oxide lubricity
- round shank versatility
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5
Drill America 15/32" x 18" HSS Extra Long Drill Bit
High-speed steel drill bit with extra reach for general purpose drilling. Features lubricity from black oxide finish and round shank for versatile toolholding; designed for chip evacuation in counterclockwise/right-hand cut operations. Noted for length and quality with mixed durability/sharpness feedback
- extra-long reach
- black oxide lubricity
- round shank versatility
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6
19/64 x 18 in high-speed steel extra long drill bit
High-speed steel drill bit with extra length for reach. Features black oxide for lubricity and coolant pockets near the edge; round shank for versatile toolholding. Customers note long flute length but mixed durability and sharpness
- extra-long length
- black oxide lubricity
- round shank versatility
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7
5/8" x 18" HSS Extra Long Drill Bit, DWDDL Series
High-speed steel drill bit with extra length for reach. Helps with general drilling, features black oxide for lubricity and chip evacuation near the edge. Customers note sharpness and quality, with mixed durability and accuracy feedback
- extra-long reach
- sharpness and quality noted
- round shank versatility
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8
Drill America 17/32" x 18" HSS Extra Long Drill Bit
High-speed steel drill bit with extra length for reach and wear resistance. Noted for sharpness and quality, though durability and straightness receive mixed feedback
- extra long reach for deep holes
- black oxide treated for lubricity
- round shank for wide mounting compatibility
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9
9/16" x 18" high speed steel extra long drill bit
High-speed steel drill bit with extra reach for general drilling. Combines hardness and toughness with black oxide finish to reduce friction and help coolant retention near the cutting edge. Customers note sharpness and quality, with mixed durability and accuracy insights
- extra long 18" reach
- black oxide surface for lubricity
- sharp, high-speed steel bit
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10
DWDDL12X3/4 3/4" x 12" HSS Extra Long Drill Bit
High-speed steel drill bit designed for extra reach with good hardness and toughness. Users note quality and sharpness, with mixed durability feedback
- extra-long reach for deep holes
- black oxide coating improves lubrication
- versatile round shank for various toolholders