Drill jig for hinges
For 3 mm standart drill bit, 5 mm hinge bit, 3 mm hinge bit
https://www.aliexpress.com/item/1005005203353309.html?spm=a2g0o.cart.0.0.3c1338dagXxQpb&mp=1
For CZ
https://www.uni-max.cz/zapouzdreny-vrtak-3-mm-pro-vrtaci-sablony/
https://www.uni-max.cz/zapouzdreny-vrtak-5-mm-pro-vrtaci-sablony/