Castell Safety International has been at the forefront of trapped key interlocking since 1922, when our founder, James Harry Castell, designed the first interlocking systems to protect the people and assets during the electrification of London.

Castell is part of the Sentric group, which consists of three sister companies - Kirk in the US, STI in FR and Castell in the UK. Sentric group produces uncompromising safety solutions for businesses whose people and equipment operate in harsh and safety critical environments. Sentric group is part of the Halma Group.

TOGETHER FOR A SAFER TOMORROW

Our brands and businesses have been leading the industry in keeping people safe at work in their sectors for over 100 years. Together we have the expertise and experience to help our customers reduce risk, keep costs down and businesses protected and compliant. But most importantly, ensuring everyone gets home safe at the end of the day.

NO COMPROMISE ON SAFETY

We believe there is no place for compromise when it comes to ensuring safety in harsh and safety-critical work environments.