13pcs HSS twist drill bit set in metal box

13pcs HSS twist drill bit set in robust metal box 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.

Specification: 2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9mm

Bright finished surface Hss drill bit packed in robut metal box with show window