بنط هرميه (2)

3Pcs Step Drill Bit Set HSS material, titanium coating surface Strengthening hardness and durability Double spiral groove, fast chip removal Effectively block metal chips and cause damage due to splashing...

Step Drill Bits Set Size Selection：4-12mm HSS material Titanium coating surface HSS spiral grooved steps drill bits cut tool Burr-free and vibration-free drilling Drilling perfectly round holes in steel, brass,...