Rubber Recess Former
The recess plug is spread open and set over the anchor head and is then attached to the mould using the stamped metal plate with the fixing screw and wing nut. On tightening the wing nut, the recess plug is pressed against the mould and clamped around the anchor head at the same time.
To extract the plug from the set concrete, reinforcement bars are to be inserted into the two openings provided. The plug is then levered out of the mould.