RSM8.1   Double Panel Support
Max. panel thickness:                                         
8mm (5/16")

VBP2.1 bolt: ø16mm (5/8")
requires ø8mm (5/16") holes 

RSM8.2   Double Panel Support
Max. panel thickness:    
8mm (5/16")   

VBP2.2 bolt: ø19mm (3/4")
requires ø8mm (5/16") holes