Drill body material：

45# 

Alloy material：

YG8

Product hardness：

40 HRC

Surface treatment：

Sandblasting, Oiling

Groove type：

Double  groove

Surface color：

Silver  the true color of the metal

Applicable material：

Cement, Brick, Concrete, Tone

Applicable equipment：

Electric hammer

Service life：

test about 20-30 holes

 of granite stone continuously 

(subject to the actual situation of the guests)

Drill body：

40CR 

Alloy material：

YG8C

Product hardness：

46-51 HRC

Surface treatment：

Sandblasting, Oiling

Groove type：

Double  groove

Surface color：

Silver  the true color of the metal

Applicable material：

Cement, Brick, Concrete, Tone

Applicable equipment：

Electric hammer

Service life：

test about 80-120 holes

 of granite stone continuously 

(subject to the actual situation of the guests)