The drill bit body is manufactured from high-quality HSS steel containing 5% cobalt (Co).
The added 5% cobalt improves the red hardness (heat resistance) of the drill bit and results in significantly extended life.
It has an attractive golden tempered surface finish.
All the sizes you need in a handy carry case.
Contains the following sizes: 1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.5, 5, 5.5, 6, 6.5 and 7mm.
