This is a BLTouch bracket for the gMax 1.5 XT. It should also work with the regular 1.5. This will not work with the XT+ printers as they have a different head design.
To install mount the bltouch to the bracket using springs to adjust the height. Then remove the two nuts and bolts holding the light bar on. Use the same holes on the head gantry to mount both the bltouch and light bar bracket.