SDS-plus concrete drill with a diameter of 12 mm and a length of no less than 400 mm! Good quality drill bit with carbide tip, to be used for drilling in stone and concrete.
We sell this model of long drills (of 400mm length) in diameters from 10 mm to 25 mm.
Not exactly the product you are looking for? Also take a look at the other variants in the categoryConcrete drills.