25pcs Tin-coated HSS drill bit set in metal box

25pcs Tin-coated HSS drill bit set in metal box

Hot roll-forged flute, cutting edge ground 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: 1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,11.5,12,12.5,13mm

Tin-coated surface Hss drill bit packed in robut metal box with show window