This is a resize of the "T handle" for some bigger keys. I just upscaled both parts to have them fit the next bigger sizes with x2 or x1.5 on all 3 axes. Thanks, Kezat.
A turn or two of electrical tape will help keep the key tight.
Used PLA with extruder temp at 200°C, bed temp at 50°C, and fan at 32% after the first layer.