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Thunderbit® T2HD Black & Bronze Jobber Drill Bit, High Speed Steel, #21, 3-1/4" L, 2-1/8" Flute, 135° Point Angle

Marsoni M251S
Sale price$63.42
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Thunderbit® T2HD Black & Bronze Jobber Drill Bit, High Speed Steel, #21, 3-1/4" L, 2-1/8" Flute, 135° Point AngleUnique spiral flute design improves chip ejection and coolant flow Heavy duty core for increased strength and reduced breakage 135 self centering split point to prevent walking Black and Gold surface treatment for added lubricity and higher drilling speeds Jobber length for most general applications Specifications Material High Speed Steel Drill Size #21 Overall Length 3 1 4" Flute Length 2 1 8" Point Angle 135
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Your Thunderbit® T2HD Black & Bronze Jobber Drill Bit, High Speed Steel, #21, 3-1/4" L, 2-1/8" Flute, 135° Point Angle orders ship within 1-2 business days.

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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Taylor Ashley
Boise, US
★★★★★ 5
Fits with my Sergand pen!
These fit perfectly with my Sergand pen! Best price I could find on Amazon! I use on my face and they make for a perfect at home microneedling.
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Reviewed in the United States on May 22, 2026
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Nikki lee stippick
Carnegie, US
★★★★★ 5
36 pin micro needle cartridges.
My favorite microneedling cartridges. They are reliable and have never let me down.
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Reviewed in the United States on April 30, 2026
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Anayanky
Charlottesville, US
★★★★★ 5
Excelente
Los amé tal y como recuerdo haberlos comprado
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Reviewed in the United States on May 12, 2026
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Dairelis Camacho
Lowell, US
★★★★★ 5
Cartucho
Son buenos y accesibles
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Reviewed in the United States on May 12, 2026
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Virginia Perez
Omaha, US
★★★★★ 5
Excelente
Buenismos
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Reviewed in the United States on May 3, 2026

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