1. The starting point can be changed arbitrarily according to the setting conditions. 2. Weight reduction by 12%. 3. 6 types that can be installed directly. 4. Those with angle adjustment can be adjusted to any angle. 5. The installation position of the magnetic switch can be freely set. 6. With magnetic switch (CDRBU2 series: CDRBU2-Z, CDRBU2WU-Z)