A USB Keyboard support post to be used with a TRS-80 Model 3 or 4.
The best fitting keyboard I have found is the Jelly Comb KS037 wireless keyboard.
Hot-glue a small metal washer on the underside of the keyboard to use with this support.
Used when replacing the standard keyboard with a USB keyboard via a NEWKEY/80 keyboard adapter.
See www.newkey80.com for details.