STS is a leader inddustry in security locks for the industrial and residential sectors.

Our client-driven orientation, added to the flexibility in our production processes, has allowed us to develop the widest range of products, ranging from the most basic of products to our patented models.

Close collaboration with the client and the extensive experience of our staff are the key elements in helping us achieve a high degree of responsiveness to our client's needs, enabling us to provide tailor-made solutions.

The design and production of our products, using state-of-the-art technology, are a result of a constant investment in R & D and the reason behind our acknowledged quality.

STS was the first company in the sector to be awarded the AENOR certificate, in accordance with the ISO 9001 standard. The increasingadaptation to the local environment and our commitment to the environment in general led to STS being awarded the ISO 14001 in July 2002.

In 2001 STS became part of the TESA GROUP, which, in turn, in the same year, came to form part of ASSA ABLOY, worldwide leader in locking systems.