Sada stupňovitých vrtákov Tin 4-12/4-20/4-32 mm

step drill set made of quality HSS steel DIN 1412C with TiN coating TiN layer increases the durability and service life of the drill for drilling alloys and steel sheets up to 4 mm thick, plastic and wood, wide grooves easily remove the drilled material 4 - 12 / 4 - 20 and 4 - 32 mm, diameters are marked on the drill bit