日常遇見的鑽頭(批) , 請問如何可以分辨屬於那一類 :

1. 鑽金屬
2. 鑽木
3. 鑽石屎

??

謝謝指導

Simply go to metal store and you get the answer. There is special drill bit for dual purpose, metal and concrete, good for drilling rivet with concrete underneath. Haven't tried out yet. Special drill bit for glass, ring saw type for larger opening.

thanks all brother

用得最多DeWalt 果套

石屎鑽，有分油壓鑽用，同一般平鑽用。
頭一樣，尾唔同的。
買時小心。

#6 parker75 兄

可唔可以分享一下 ?

thanks

油壓鑽咀係開坑，特别巧力强勁！

Hammering drill bit is of two types, one rectangular (4 slots) the other round. Won't fit if you buy the wrong type. Got both sets.

The ones with hexagonal shanks are useful for drilling metal/wood, fitted with impact driver.

google
drill bit shank types
tinyurl.com/56r3uxn6