Material: HSS
Type: 6mm/6.4mm/8mm/9.5mm/10mm/12mm/12.5mm/12.7mm
With the use of tenon machine, if the manual open hole, you need hand drill and hammer and other tools.
High quality material with long service time.
The whole heat treatment, HRC48-50, high hardness.
100% brand new and high quality.
Drill lengthened, high concentricity.
Package included:1pc Square Hole Drill Bit
Note: Please allow 1-2mm error due to manual measurement.