Cemented carbide rotary file has the following characteristics:  

(1) Any metal (including hardened steel) and non-metallic materials (such as marble, jade, bone) below HRC70 can be machined at will.  

(2) It can replace small grinding wheel with handle in most work, and no dust pollution.  

(3) High production efficiency, dozens of times higher than the processing efficiency of manual file, nearly ten times higher than the processing efficiency of small grinding wheel with handle.  

(4) Good processing quality, high finish, can process a variety of high-precision mold cavity.  

We are factory that specialising in producing drill bits,hole saw and saw blade. 

We are the professional manufacturer of hardware tool accessories, specialized in drill bits, hole saw, cutting discs and various tool sets. Besides, we also supply kinds of hand tools, include measuring tapes, caulking guns, cable ties,etc.

Contact me if you have any questions for twist drill bit, step drill bit and wood working drill etc.

Common drill bits include twist drill, woodworking drill, hole drill and flat drill.  Each has its own advantages and limitations.  

We can aslo provid you electric hammer drill,hole saw and saw blades...

8pcs wood working cork drill