Boart Longyear Limited is an integrated provider of drilling services, capital equipment and consumable products for customers in mining and minerals exploration, environmental and infrastructure, and energy industries. The Company conducts these activities through two operating divisions: Drilling Services, which provides services to a range of customer base and offers a range of drilling technologies, including, but not limited to, diamond core, underground, reverse circulation, percussive, rotary and sonic drilling, and Products divisions, which manufactures and sells capital equipment and consumables primarily to customers in the drilling services and mining industries globally. These products include rigs and products, such as bits, rods and in-hole tools for exploration drilling, rock drilling and environmental, infrastructure and construction applications. On November 23, 2011, it announced that National Australia Bank Limited ceased to be a substantial holder in the Company.