Blade steel drill (also known as core drill or core drill) is more efficient bit of annular cutting blade, the hole diameter from 12 mm to 150 mm, it is mainly used for drilling of steel members, such as steel structure engineering, rail transportation, Bridges, ships, machinery manufacturing, aerospace, and other areas of the hole drilling, the drilling performance is superior to the traditional two blade twist drill, With the characteristics of high drilling efficiency, light drilling and labor-saving, multi-blade steel drilling and magnetic drilling rig matching can be large: workpiece multi-directional drilling, convenient and flexible operation, effectively shorten the construction time, become the modern steel member drilling and annular groove processing of the preferred tool.

Behappy Crafts (Suzhou) Co., Ltd is located in Suzhou, with excellent geographical location and convenient traffic. It takes only Half an Hour to Shanghai Dock, which is the biggest dock in China.
We are factory that specialising in producing drill bits,hole saw and saw blade. 
We have our professional technicians, advanced production machines and an integrated sales team. We can take the full responsibility for the whole process, including design, manufacture, package and after-sales service. We also provide OEM, accept customize according to client`s request.

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