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twist drills /  high speed steel (HSS)
select a drill series
drill series
  length type   material
 
A601 fractional 1/64" - 1/2"   jobber   bright finish HSS
A601S fractional 1/64" - 1/2"   jobber
   black oxide finish HSS
A631 fractional 1/64" - 1/2"   jobber   M42 cobalt
A637 fractional 1/16" - 1/2"   jobber   tin coated HSS
A666 fractional 3/64" - 1/2"   6" aircraft   black oxide finish HSS
A612 fractional 1/16" - 1/2"   12" aircraft   black oxide finish HSS
A911 fractional 33/64" - 1"   Silver & Demming   Polished flute HSS
A401 letter sizes A - Z   jobber   bright finish HSS
A801 wire gauge sizes #1 - #80   jobber   bright finish HSS
A681-A691 metric 1mm - 13mm   jobber   black oxide finish HSS
 
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