The GRI 400 series of commercial and industrial switch sets incorporates hidden terminals, inset into the recessed back to provide tamper resistant installations.
The unit has a regular gap of 1 1/2? which covers the various types of steel door and frame conditions found at every commercial and industrial site.
Spacers and mounting hardware are included with the set. Switches, magnets and mounting brackets are also available separately
The 50R Series are 1/4 diameter switch sets designed for applications where a small diameter recessed switch set is required.
This makes the set desirable in residential installations where no sign of an alarm system should be seen or where there is not room to install a larger diameter switch set.
The 50R-12 is a straight cylindrical set for flush or counter sunk installations.