1.diamond drill bits aet
2.drilling forcocnrete ,bricks , marble ...stone materials
3.the size rang from 1" to 10"diamater
Port: shanghai port
Minimum Order Quantity: 100 Piece/Pieces
Supply Ability: 200 Bag/Bags per Day
Payment Terms: T/T,MoneyGram
Contact SupplierPackaging Detail: white box
Delivery Detail: in 1 month
1.diamond drill bits set
2.drilling forcocnrete ,bricks , marble ...stone materials
3.the size rang from 1" to 10"diamater
4. Core drill bits have a hollow center and cut a circle in the material to create a hole. This results in a hole the size of the drill and a smaller "plug" or "core" which comes from the center. Diamond core drill bits are available in sizes from 1" to 10" (outside diameter).