Roller Door replacement 2 segment fixing spring autolock locking strap (top connecting strap) to suit most insulated roller garage doors.  
 
With fixing holes in the 3rd attachment piece which has fixing holes at the following centres; 58, 65 or 73mm
 
3rd attachment piece is riveted or screwed to the top barrel (boom) which the roller door curtain wraps around
 
The grey connecting piece (which attaches to the top of your roller door curtain, called the lath), is reversible so it fits both 77mm and 55mm high laths
 
Comes complete as pictured
 
Used to secure your Roller Garage Door or Roller Shutter Curtain to the motor barrel - generally a 50mm or 60mm barrel is used with this strap
 
Made from ABS plastic