Hollow drill bits are also known as core drill bits, hole openers, center drill bits, steel plate drill bits, magnetic drill bits, rail drill bits, etc.
The main materials of drill bits are: high-speed steel; powder metallurgy; cemented carbide.
The hollow drill bits have a complete range of types and specifications and are suitable for various brands of imported magnetic seat drills (magnetic drills) and general drilling machines, milling machines, boring machines, etc. This product is used in conjunction with an imported magnetic drill, and the drilling efficiency is 8 to 10 times that of ordinary drill bits.