BASEMOUNT QD Adapter plates - Fit and remove in seconds! Enables the Extreme or Compact basemounts to be quickly removed from the cabin roof or A frame to avoid damage by trees or low objects when trailering or restrictive barn or garage entrances. Features: Made from robust 3mm stainless plate with welded 12mm stainless fittings. 150mm diameter with 4 x 6mm fixings @ 80 mm centres Weight 0.9kg.