Achieve the perfect balance. The BN-100 achieves true balance over a tool’s entire vertical travel length. Suitable for any tool weighing between 33 and 250 lbs (15 and 113 kg). Plastic coated stainless steel cable. And no lubrication reqiured. Ultra-long life. For the most demanding conditions. The BN-100's corrosion-resistant aluminum cylinder provides durability under the most demanding conditions. And with fewer moving parts for longer life and less need for preventative maintenance.