Based on this product's specifications, here are some alternatives and similar models
Wrench Proxxon 12 mm flat-ring MicroSpeeder PR23261
Summary description:
Proxxon 12 mm flat-ring wrench MicroSpeeder (PR23261) is a hand tool designed for tightening and loosening hexagonal nuts and bolts. The flat-ring (combination) design combines an open-end with a closed ring end for access in confined spaces and reliable grip. Suitable for mechanical, automotive and precision workshop tasks where compact, accurate torque application is required.