Tungsten steel alloy cross drill bit 150mm concrete drill bit 6-16mm SDS-PLUS square shank. For drilling through walls and stone
https://www.vogueparade.com/shopping/EN/100006468/1/1005003740322692/tungsten-steel-alloy-cross-drill-bit-150mm-concrete-drill-bit-6-16mm-sds-plus-square-shank-for-drilling-through-walls-and-stone//