This hammer drill with torque limiter and powerful motor can accept a large diamond core bit 150 mm(5-7/8)in dia. This tool is ideal for making clean-cut, smooth holes in tile, ferroconcrete, marble, brick, etc. Heavy duty construction – ideal for site work. Percussion action for drilling pilot hole. Rotary action for dry diamond core drilling. Torque limiter to prevent operator injury if the core bit snags. Excellent for plumbers, electricians, general contractors, hirers. Max dry diamond core. 0 – 1500 rpm.