Gradual drill from Yato YT-44745 Designed for drilling in high -quality stainless steel, structural and cold rolled steel, in colored metals, steel sheets, plastic. • Made of high -speed HSS 4241 steel, nitride with titanium nitride increasing the life of drills • The edges of the drilled hole remain clean and without burrs • automatic centering on rounded and slippery surfaces • Fast heat dissipation when drilling in hard materials With 3 flat surfaces, it gives the possibility of transferring the maximum torque