25pcs HSS half ground drill bit set in metal box
25pcs HSS half ground drill bit set in robust metal box with show window from China drill bit manufacturer
Hot roll-forged flute drill bit with specaill heat treatment gives additional toughness with increased durability of the drill bit.
Polished flute and groud cutting edges for the most accurate hole dimensions and high concentricity.
Economical high speed steel drill bit for general drilling
The drill bit used in steel, cast steel, malleable iron, sintered metal, non-ferrous metal and plastic.
Silver surface Hss drill bit packed in robut metal box with show window