The FD-HK300 hold up bar provides discreet and silent hold up protection for under counter protection. When the rail is activated, two red, plastic indicators become more visible, which is the confirmation that a rail has been triggered. The plastic indicators can be manually reset by forcing back to the normal, rest position with a screw driver. The rail can be screwed directly to the floor or on the underside of a counter. The black base part of the rail is fixed and the top, aluminium section is moveable.