Mitigates effort needed to lift heavy lids and doors.Balance adjustment allows for use in a wider range of lids than conventional lift-assist hinges.Soft closing.External surface mounted.Torque adjustable (10%).Features durable plastic cover for clean appearance.Applications: Medical equipment, analytical instruments, semiconductor equipment.WARNING: This product can expose you to chromium, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.