Photogrammetry.
Photos captured with a home made cross-polarized setup on a Canon eos700d.
Model reconstructed in reality capture.
Retopology and uv’ing done in blender.
Baking, color corrections and Roughness + metallic maps with substance designer.
And old hammer, originally used for woodworking by my great-grandfather. When its handle started to crack, at some point someone stabilized it by wrapping steel wire around it. This still holds it firm to this day.
Model for sale here: https://www.artstation.com/a/11740299