Height adjustable: the siwitec post holder for setting in concrete is height adjustable from 150 to 190 mm. The adjustment is done by an M20 thread The support is set in concrete with the Pin and thus ensures optimum stability. USABILITY - Thanks to the adjustment range of 500 - 560 mm, height differences of 60 mm can still be compensated even after concreting. FEATURES - The Post support is easy to install and takes very little time. Hot Dip Galvanised Adjustable Post Support 110x110mm Screw Post Support 110 X 110 X 250 Mm Adjustable Hot-Dip Galvanised Height Adjustable Concrete Anchor Base For Fence Posts Gazebo Height Extender Simpson Strong Tie ABU44RZ Z-Max Adjustable 4 x 4 Rough Post Bases with corrosion protection The existing Mandrel ensures that the screw connection to the post is more stable. PRODUCT - Post support for setting in concrete can be adjusted in height even after setting in concrete thanks to the right/left-hand thread. The Post Support 110 x 110 for setting in concrete is also available without a mandrel. The hot-dip galvanisation provides the Post Support with optimal protection against external weather influences.