Drill Bit Blue Granite 12x200x250mm. Longer life in concrete or granite and faster drill speed in comparison to the competition. It is extremely bend-resistant. Impact-resistant heavy-duty drill bit, manufactured to ISO 5468, for impact drills up to 1000 Watt and rotary hammer with chuck tool holder. Suitable for fixing holes and drilling in concrete, granite, natural and artificial stone, masonry and bricks.