6mm BB quick release for flat head 1/4" or 8mm screws

i designed this to mount undertrays on my car in a convenient way. basically they replace screws so to service your car from the bottom, all you do is press the button to release the tray.

i load tested them to 150lbs and i ran out of weights. the most important part is using a strong glue between the BBholder and the outerhousing. the way i reinforced it was by heating up little bits of paper clips and pushing them into the plastic from the side