PRESTO 3.9mm HSS Jobber Drill Bit 

PRESTO 3.9mm HSS Jobber Drill Bit 

General-purpose drill, to drill steels with tensile strength up to 1.000 N/mm2, cast steel, grey cast iron, malleable cast iron, nickel brass and graphite. 

Overall Length – 75mm 

Flute Length – 43mm 

Material – HSS 

Finish – P1 Steam Tempered