Metal drill A 4,0 mm (AvtoDelo) 40846
- Bit drills twisted with a cylindrical shank alloyed with cobalt.
- Material - high-speed steel P6M5K5 with a cobalt content 5%.
- Has a cross-shaped sharpening of the cutting part at an angle 135 ° which reduces the possibility of drill displacement during works.
- Bit drills are hardened to 64-67 HRC.
Barcode: 4752279408464