Diamond core drill bits for stone drilling

Diamond core drill bits for Stone drilling
Application:drilling granite, cobblestone, marble and other stone structures.
Screw:1-1/4-7,1-1/4-3,1/2BSP,M22and others
Shank Type:Hexgon or others
Raw Material: Seamless and Precision Steel Tube & Alloy Diamond Segment
Welding Process:High Frequency&Laser welding
Payment Method:T/T,L/C,D/P,PayPal,Western Union and others
Original:China
Direct Factory,Customization Accepted