Available with or without flanges, the inserts are driven into wood with a
hexagon allen key or hexagon driver. They then provide a hard female thread
which can be used many times without fear of stripping.
They are manufactured from zinc alloy for lightness and are zinc plated for
Please note that plating may be 'yellow' as pictured, or silver colour.
One of the great advantage is that these inserts can be driven in from
the 'screw side' of a fixture, i.e. from the front of a model aircraft
firewall or undercarriage plate, which makes them great where hand
access inside is very tight.