5pcs 6.5mm Nitride Titanium Coated High Speed Steel (HSS) 4341 Twist Drill Bits 9mmx9mm First round the iron pipe

First round the iron pipe with white paper

unique design appearance is great for additional decoration in your home

Installed in the square hole machine directly

Markers Color: 8 Color

This switch is easy to assemble on the electric hand drill and convenient for usage

5pcs 6.5mm Nitride Titanium Coated High Speed Steel (HSS) 4341 Twist Drill Bits 9mmx9mm First round the iron pipe4341 high speed steel contains high content of carbon and alloy elements, providing excellent cutting performance, high heat resistance, high hardness, wear resistance and durability. Suitable for applications requiring precise and efficient processing. Black nitride and gold titanium dual coatings can apply lubricant better for smoother drilling and are more durable and corrosion resistant. Large spiral grooves facilitate the export of metal chips,