... one tool and holes are deburred automatically by the following step.*Suitable for drilling in alloyed and non alloyed steel sheet ... one tool and holes are deburred automatically by the following step.*Suitable for drilling in alloyed and non alloyed steel sheet ... drilling speed and faster dust rejection. SizeDiameter ListOverall Length(mm)Step QTY.4-12mm4,5,6,7,8,9,10,11 ...