This is a tool for adjusting the lockshield valve on radiators. It is designed for the size used in the UK.

The hole sizes are 7.2 x 4.5mm.

I printed it in PLA at 100% infill on an FLSun Q5.

It is surprisingly strong, allowing me to close the valve very tightly with no leakage.

If you'd like to modify it, or would like a modified version to be made and uploaded, just ask.