The segmented steel expander shield is assembled ready for use with bolts or threaded rods of the appropriate diameter. Function - torque controlled friction locking expansion. Three piece shield for even load spread. Traditional fixing method with wide user acceptance. Zinc plated and passivated for corrosive protection. Suitable for: Concrete B15 and natural stone with dense structure. For fixing of: Installation rails, ventilation ducts, pipework, suspended ceilings, metal profiles, shelf feet. Also suitable for temporary fixings such as wall shuttering.