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Mibro 5/16 in. Diameter Cobalt Steel Drill Bit

SKU # 390740599
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Item Information

This Mibro 5/16 in. Diameter Cobalt Steel Drill Bit is a perfect addition to your tool set.

  • 135 degree split point

Specification Description
Brand: Mibro
Hole Diameter: 3/8 in.
Package Quantity: 1
Product Length: 7-7/8 in.
Product Type: Drill Bits
Product Width: 1-5/8 in.
Manufacturer Part Number 250381
Mibro 5/16 in. Diameter Cobalt Steel Drill Bit is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Excellent product! I am currently building a project for the ranch and am using a great deal of metal. As a result, I am using The MIBRO TOUGH METALS COBALT drill bits. They are the best bit for the money I've found and I particuarly like the the "flats" in the shaft to keep the bit from spinning in the chuck as well as the cutting properties.
Date published: 2010-08-19
  • y_2019, m_6, d_16, h_15
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Are these M35 5% or M42 8% Cobalt?

Asked by: JKirk
Dear Customer, Thank you for your interest. MIBRO branded cobalt drill bits are made of M35 steel. Sincerely, MIBRO Customer Care
Answered by: MIBRO Customer Care Team
Date published: 2019-05-27
  • y_2019, m_6, d_16, h_15CST
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