These diamond core drills that feature a half inch British Standard Pipe (BSP) male thread. This means that only diamond core drill bits with this thread type can be used in this drill and, as such, these BSP diamond core drills are designed specifically for diamond core work. 

Diamond core drills are heavy-duty specialist drills, which are typically used by plumbers and heating engineers. 

For those who require a diamond core drill with a little more flexibility, keyed chuck diamond core drills can support other types of drill bits.

• The key consideration when selecting between diamond core drills is the maximum drilling diameter required. Additionally, if you want to use the drill for applications other than just diamond core drilling, you will need one with a keyed chuck. 1/2' male thread allows the diamond core drill bit to be attached directly meaning this machine is exclusively used for diamond core drilling

• There is often a choice between single or 2 speed gears. Most diamond core drills have a variable speed function.