Part# KB-MSP-80-XRND-47T-2x12 ; Kustom Bitz hot rod or custom car chassis bracket. This unit is a Front plate which is intended you can bolt this to the weld on bracket that gets welded to the chassis rail. Weld your fabricated chassis cross member to this bracket.

Laser precision cut mild steel. All holes are also laser cut for precision fit with our matching other pieces in the range.

Dimensions
Holes = 12.5mm [to allow clearance for 1/2" UNF bolts]
Height = 68mm
Width = 104mm
Thickness = 8mm 
Tube Diameter = 47 OD

This part matches Back plate KB-MSP-120-XRND-BL-2

Or you could use four of these brackets to join 47mm OD tube to make a removeable chassis crossmember.

Of course you can use them for anything else you see fit.