Premium M42 Cobalt Gold Screw Machine Length Drill Bit Set.
These M42 Cobalt Drills are great when working with hardened metals and even stainless.
This set is 1/16″ to 1/2″ by 64ths
Screw-machine-length drills are 5/8 as long as normal jobber-length drills.
Screw-machine-length drill bits are shorter than jobber-length.
Sometimes called stub-length drill bits, they provide more strength and rigidity and can drill straighter holes than longer drill bits. Short length also allows them to access tight spaces where longer drill bits cannot fit.