also call brazed diamond core drills,
this kind of brazed drill bit is mainly used to drill Granite(Veneziano Gold),
Marble(Volga Blue),concrete and wall.With years of research and application
of drilling bit and the world-advanced technology of diamond
brazing,this jagged drilling bit adopts the patent technology,
it is with very free drilling,high efficiency,excellence and
long drilling life.
Dia.	Dia.(Shank)	Depth of Drilling	Outer Thread
6--200mm	5--13	40mm	G1/2
6--200mm	M3/8 or M5/8 or M14.etc	40mm
Speed	Drilling Marble(Volga Blue) in thickness of 20mm		5--20 secs./bore
	Drilling Granite(Veneziano Gold) in thickness of 20mm		15--40 sec./bore
Working life	Drilling Marble(Volga Blue) in thickness of 20mm		50-2000 bores
	Drilling Granite(Veneziano Gold) in thickness of 20mm		200-400 bores