Why Back Check Matters on Heavier Doors

Back check function on this closer resists sudden over-swinging when a heavier door (up to 80kg here) gets pushed open too forcefully, protecting both the hardware and nearby walls from impact damage — a feature the lighter-duty concealed model in this same product line doesn’t include. Combined with adjustable closing force and an independent buffer for the final closing stage, it’s built for heavier-duty doors than a standard mid-weight closer would need to handle.