Made of high quality steel and hard alloy metal which is durable and practical with a long service life.
High frequency welding technology, the welding openings is very strong, both of the inside or outside welding mouth are smooth.
Easy Chip Removal: Professional and unique design of the chip flutes ensures a smoother chip removal during opening, lower resistance, faster speed, and higher drilling efficiency.
Wide Application: Mainly work on the tube breakthroughs and the opening in wall of air conditioner, range hoods and sewer pipeline. Great for sandy stones, artificial stones, concrete.