This is a 40 Pin Low Profile ZIF Socket. ZIF stands for 'Zero Insertion Force'. Install one of these in your current IIgs CPU Socket and you'll never have to worry again about damaging your CPU, CPU Cable or CPU Socket when removing or adding your CPU or accelerator card to your IIgs. Just flip the lever and your CPU or CPU Cable will be released. No more pushing or prying needed!
It's easily installed in your current IIgs CPU Socket. No soldering needed.
Below are some pictures of what the 40 Pin Low Profile ZIF Socket looks like installed in a ROM3 and also a side profile showing just how slim the Socket is.