3PCS high-speed steel nrided black spiral fluted triangular

Hexagal Shank Nrided Black Fluted Step Drill 3-12 4-12 4-20

3- high-speed steel nrided black spiral fluted triangular sh

Nrided spiral fluted step drill wh triangular shank 10-45mm/

100pc black twist drill set 1mm2mm3mm4mm5mm nrided high spee

Hexagal Shank Nrided Black Fluted Step Drill 3-12 4-12 4-20

High-speed steel 3pc inch nrided step drill hexagal shank st