The PFC48-1, PFC41-1 and PFC42-1 series of contacts are strong commercial grade 3/4″ Diameter Recessed Magnetic Contacts. The outer case is only 0.410″ deep so that it can be recessed in thin door frames typical of concrete construction. The patented Flair recessed case locks into several gauges of steel doors. Standard electrical configurations are NC, NO, SPDT, and DPDT. Regular gap in a steel door is 1/2″ and wide gap is 1″. This series of contacts can be customized by adding resistors, longer wire and even company logo. When you need a strong economical recessed contact nothing beats our PFC48-1, PFC41-1 and PFC42-1 series.