Core drill bit adopts H.E.D technology, combined with laser welding, the product is more efficient and safer to use! It is mainly used in buildings to drill holes in the wall when installing water, electricity, heating, gas, air conditioning, and pipes. It is also for drilling and coring of highways, airport runways, bridges, tunnels and other projects.

Diameter (mm)	Thickness (mm)	Connection	Effective length (mm)	Toal length (mm)	Segment size (mm)	Segment number	Segment shape
52	2	1-1/4"UNC	400	470	24*3.5*10/12	5	Normal   Roof shape   Grooved turbine shape
62	2	1-1/4"UNC	400	470	24*3.5*10/12	6
102	2	1-1/4"UNC	400	470	24*4.0*10/12	9
122	2	1-1/4"UNC	400	470	24*4.0*10/12	10
152	2.5	1-1/4"UNC	400	470	24*4.5*10/12	11
182	2.5	1-1/4"UNC	400	470	24*4.5*10/12	13
220	2.5	1-1/4"UNC	400	470	24*4.5*10/12	15
250	2.5	1-1/4"UNC	400	470	24*4.5*10/12	16
300	2.5	1-1/4"UNC	400	470	24*5.0*10/12	18
350	2.5	1-1/4"UNC	400	470	24*5.0*10/12	21

The drill bit arc can be customized according to customer requirements.