diamond core bits for rock

If you need diamond core bits for rock,pls leave us messages.
Product Name:Diamond rock core drill bits with long lifespan
Brand:WanTong
Size:DIA.8-600MM
Quality grade: High, Medium(could be selected)
Product Descriptions:
1) For concrete,High can drill 18-20m,Medium 12-18m
2) Long Drill,from 80mm-1200mm in total length
3) Diameter from 8mm-600mm. Other sizes are available.
4) Connection: 1-1/4 UNC or any other thread.
5) We can offer our clients good after-sale service and professional technical assistance.
Specifications:
1. Used for hole drilling of reinforced concrete, marble, granite, asphalt,etc. 
2. Good working performance. 
3. Affordable price. 
4. Diameter 8 to 600mm.

FAQ:
Q1. How is your quality?
A1. We have a very seriously control system(ERP system). We guarantee the high performance of our products.
Q2. Do you have different quality for different kind of stone?
A2. Yes, according hardness of stone and stone's feature, we have different typology respectively.
Q3. If we need technical support, can you offer us?
A3. Yes, we have an experienced team, offering our customers additional benefits with specific advice, by our product managerment staff, engineers and technicians.
Q4. Is there cheap shipping cost to import to our country?
A4. For small order, Express will be the best, And for bulk order, sea ship way is best but take longer time. For urgent orders, we suggest via air to airport or by Express send to your door.
Q5. When you can reply to me when I send you an Inquiry?
A5. We promise to reply within 24 hours( including holidays) on receipt of your inquiry.

It is available to manufacture as customer's requirement.

For more information,pls visit http://www.hhdiamondtools.com/Product/Product-2-1.html