- The series of long Bits DIN 340 is best suited for deep and hollow profile holes .; - Manufactured according to DIN 340; - 118 ° split point; - Enamelled silver surface.
- High-performance rolled, steam-treated twist drill made from heavy- duty high speed steel. - The manufacturing procedure (no structural disruption) solidifies the material making it more elasticated. - This makes it more resistant to fracture and suitable for robust drilling units. (e.g. hand-held drilling machines)