Chaves da Foz Lda is a Porto-based locksmith and security company serving customers since 1990. Its services cover residential, automotive and safe security, with assistance for people locked out and support for a range of locks and doors. The company supplies and services Fichet security doors and locks, as well as Dierre doors and locking systems. Its offerings include lock and door repairs, replacement kits, security cylinders with non-copyable keys, and installation or assistance for Mottura products.

For automotive needs, Chaves da Foz provides car keys with remote controls, electronic chips and folding-key designs. It also duplicates keys and garage remotes, repairs car locks, and offers vehicle opening services. Safe options include fire-resistant monobloc models, wall-mounted safes and made-to-measure units. The company additionally provides door-opening assistance, including emergency service available until midnight. Chaves da Foz is located on Avenida do Brasil in Porto and invites customers to request a free quote for Fichet security doors.