These are the Controlnet models used for the HandRefiner function described here: https://github.com/wenquanlu/HandRefiner/. Implementations for both Automatic1111 and ComfyUI exist, via this extension https://github.com/Mikubill/sd-webui-controlnet and this node suite https://github.com/Fannovel16/comfyui_controlnet_aux.
Attention: please rename hrnetv2_w64_imagenet_pretrained.pt back to *.pth after downloading.