Complaint
Fixed diameter hole opener, there are ordinary type, impact type, water-cooled type, of which water-cooled type is often used for wall opening, high efficiency, opening more beautiful.
According to the material classification: bimetal hole opener, carbide hole opener, diamond hole opener, different materials used to cut the material is not the same, the most commonly used is bimetal hole opener, hard metal materials recommended to use carbide, glass, carbon fiber, ceramics and other easy to crack the material recommended to use diamond hole opener.
