When sizing and selecting RETENTION SYSTEM sockets for post installations, a comprehensive range of ductile-iron and cast-steel RS sockets is available for many common application types and standard industry size posts. RS sockets within this range can also can be fitted with adapters to match post sizes. RETENTION SYSTEM engineered sockets are made to order as per customer installation requirements for for non-standard post sizes / profiles or to meet difficult site conditions. Various RS base options are available for both standard and engineered RS sockets to facilitate cable ducting options and shallow fixing requirements. A range of RS accessories and options further extends RS socket foundation applications and optimises post installations in RS sockets.