R1  Anchor    
Interior top wall or ceiling anchor


R3  Anchor
Exterior wall or ceiling anchor
For threaded rods
To be used with OPR4 and OPR7

 
R3.0  Anchor   
Exterior wall or ceiling anchor
For unthreaded rods
To be used with OPR2, OPR3,
OPR4, OPR5, OPR6 and OPR7