This handle for the BeamCase system can be mounted anywhere along the Makerbeam XL profiles or between them. They can also be utilized as feet. 
This handle can be used with a bare frame, or with outer panels, there are two separate versions for use with panels and for use with the bare frame
 

Components structure and naming:

Each bracket comes with an IFW number that indicates the compatibility (150IFW is used with BeamCase SFF and the others with BeamCase Sandwich versions).
IFW stands for Inner Frame Width and describes the distance between the Makerbeam XL profiles at the top, front and bottom. The IFW number is an indicator of the width of the case and is important when selecting accessories and case panels. 

Required Hardware

Screws: 
M3x16mm countersunk screws (2pcs per handle)

Nuts: 
standard M3 nuts (2pcs per handle)

Print Instructions:

This part can be printed in any filament, but it is advised to use at least 3 walls and 20% infill for enough strength. Ideally compensate for shrinkage, for an optimal fit. 
This print like all BeamCase parts does not require any supports. 

I adjust for ABS shrinkage by scaling the model to 100.5% (Bambu Lab P1S and Sunlu ABS) , but it depends on the filament and printer and print speed.