Used in Roll Up Shutters and Roll up shades with manual over ride
Manual Override: you can crank with handle when power is out.
This motor comes with instructions
UNIVERSAL+ CRANK HANDLE SOLD SEPARATELY
GOES IN SMALL MOTORS 40 AND 60 MILLIMETER
LARGE MOTORS 70&90 MILLIMETER
when the motors is 60mm diameter of tube= 2 1/2 inches
Small Motor ( 50nm) with override