diff --git a/src/pages/XRSession.tsx b/src/pages/XRSession.tsx
index b9c02cc..672120c 100644
--- a/src/pages/XRSession.tsx
+++ b/src/pages/XRSession.tsx
@@ -346,6 +346,7 @@ const XRSession = () => {
   const [freeMove, setFreeMove] = useState(true);
   const [placementMode, setPlacementMode] = useState(true); // start in placement mode
   const [snapToPlanes, setSnapToPlanes] = useState(true);
+  const [allowScale, setAllowScale] = useState(false);
 
   useEffect(() => {
     if (!model) navigate('/');
@@ -445,7 +446,14 @@ const XRSession = () => {
                 toast.success('Modelo posicionado na superfície!');
               }}
             >
-              <XRModel url={model.url} />
+              <XRGrabbable
+                allowScale={allowScale}
+                onGrabStart={() => {
+                  if (placementMode) setPlacementMode(false);
+                }}
+              >
+                <XRModel url={model.url} />
+              </XRGrabbable>
             </XRHitTestPlacement>
 
             <XRMeasurementOverlay />
@@ -463,6 +471,8 @@ const XRSession = () => {
           onTogglePlacement={() => setPlacementMode(!placementMode)}
           snapToPlanes={snapToPlanes}
           onToggleSnap={() => setSnapToPlanes(!snapToPlanes)}
+          allowScale={allowScale}
+          onToggleAllowScale={() => setAllowScale(!allowScale)}
         />
       </div>
     </div>