stone U slot diamond drill bit diamond drill bit for hard stone

  The "Guangjing" 4mm  stone  diamond core drill bit  provides high quality drilling with a low cost. These drill bits have U slot design to cut through granite, marble or any other hard material with ease.   Made of high carbon steel with industrial grade carbide tip for long life and efficient drilling.

Packing Details:  20pcs / Carton; Standard export package

Lead time:  7 days

Delivery method: By sea, by Air, by international express service (Fedex, DHL and etc)

Easy to start your business

Samples available for testing.

No minimum order quantity required until the Fourth order.

Reply within 24 Hours
Professional consultation service is available within 24 hours after receiving your feedback regarding the iterms that that you bought.

Compensation Policy
Any quality problem caused by our company side with enough evidence, we promise you that if could be re-produced for free.

Strict quality control

Our company has advanced optical microscope, hardness testing, partical size analyzer and no dust batching workshop. There are mature and stable produce technology and well-trained workers. The products would be chosed for testing before exported. These factors are vital to provide high quality products to customers.

Guangzhou Crystal Technology Co., Ltd is a professional diamond tool manufacturer established in 1985 by Chinese Academy of Sciences. The factory locates in Guangzhou with a total area of 16200 square meters. It has over 100 well trained workers and 10 experienced engineers.

With the continuously-updating automatic machines and strong development ability, it has the capability to produce high quality as well as cost effective diamond tools for different markets. Focusing on diamond tools for ceramic and stone application, it also includes diamond tools for concrete, asphalt and glass application.

It gains high reputation with the domestic brand named “Guangjing” by itscreditable products and services. Since 2001, the company has started to export to Europe, US and many other areas and built up stable relationship with distributors.

We warmly welcome you to visit our factory if possible. We also sincerely hope to cooperate with you.