Outdoor musical instruments -Ground Fix installation involves digging a hole to install the instrument post/s directly into the ground to be concreted in.
Outdoor musical instruments -Surface Fix installation is ideal for when it is not possible to dig into the ground (e.g. concrete or expensive safer surfacing which you do not want to damage). The 'surface plates' provided can be fixed/drilled in the desired location using recommended suitable ground anchors - bolts or fixings (not supplied) for a quick, easy solution.
But we will send 2 installation instructions with each product when shipping the outdoor musical instrument. So you can have 2 choose.