The 450mm decking clamp holds the decking board down to the joist while the DM 4006 clamp pulls the boards together to your selected gap setting.

Simply hook the end of the DM 450 to the underside of the joist and then set over board being fixed and set clamp firm to surface.

Once in position simply squeeze the quick set grip until in position.

Deck-Max has taken a 70mm bend/woof out of a 140mm x 25mm board using this decking clamp.