Based on this product's specifications, here are some alternatives and similar models
Thread adapter BIG 1/4"–3/8" 9 mm model 428284 for tool fittings
Summary description:
Thread adapter BIG model 428284 converts between 1/4" and 3/8" threads with a 9 mm body. It is designed for connecting tools and fittings with differing thread sizes, simplifying compatibility between air or hand tools and accessories. Compact and easy to install, it provides a secure threaded connection for workshop or professional use.