When it becomes necessary to install the CRL 3/8" (10 mm) Cable System into a concrete floor or wall, the Concrete Anchor is designed with an M8 thread which will attach to the Cable System Base Fitting. The Concrete Anchor can be easily installed by drilling a 5/16" (7.9 mm) diameter hole 2" (51 mm) deep into the concrete. Tapping the top of the Anchor with a hammer will result in securely fastening the Anchor into the concrete.