for DIY use are for drilling in concrete and natural stones. Usually fitting to angle grinder, you can drill all the things that you want, enjoying yourself of DIY drilling. Hole Core Drill
is always for drilling kinds of concrete materials, like concrete, brick and blocks. Electroplate Core Drill
are mainly for stones, like granite, marble, tile and so on. All the diameter of this kind of core drills is ranging from 16mm to 100mm, the total length is 68mm and 80mm. Wet use and dry use are both acceptable.