Conical Drills Polledri

This tool have been built to drill flat materials of thickness till 2 m/m and pipes till thickness 3 m/m.
With each tool a large range of holes can be produced on every kind of material without pre drilling.
TYPE 0: From Diam. 3 to Diam. 14
TYPE 1: From Diam. 6 to Diam. 20
TYPE 2: From Diam. 16 to Diam. 30
TYPE 3: From Diam. 25 to Diam. 40
TYPE 4: From Diam. 37 to Diam. 53
LONG TYPE: From Diam. 6 to Diam. 30
Shank with 3 flats