diff --git a/applications/utilities/mesh/manipulation/setSet/setSet.C b/applications/utilities/mesh/manipulation/setSet/setSet.C
index 2f5b6a5cca..df20caa2ff 100644
--- a/applications/utilities/mesh/manipulation/setSet/setSet.C
+++ b/applications/utilities/mesh/manipulation/setSet/setSet.C
@@ -85,7 +85,7 @@ void writeVTK
         vtk::writeFaceSet
         (
             mesh,
-            currentSet,
+            dynamicCast<const faceSet&>(currentSet),
             mesh.time().path()/vtkBaseName,
             vtk::formatType::LEGACY_BINARY
         );
@@ -96,7 +96,7 @@ void writeVTK
         vtk::writeCellSetFaces
         (
             mesh,
-            currentSet,
+            dynamicCast<const cellSet&>(currentSet),
             mesh.time().path()/vtkBaseName,
             vtk::formatType::LEGACY_BINARY
         );
@@ -106,7 +106,7 @@ void writeVTK
         vtk::writePointSet
         (
             mesh,
-            currentSet,
+            dynamicCast<const pointSet&>(currentSet),
             mesh.time().path()/vtkBaseName,
             vtk::formatType::LEGACY_BINARY
         );
diff --git a/src/meshTools/output/foamVtkWriteFaceSet.H b/src/meshTools/output/foamVtkWriteFaceSet.H
index 24ba0c3932..2469b45f3d 100644
--- a/src/meshTools/output/foamVtkWriteFaceSet.H
+++ b/src/meshTools/output/foamVtkWriteFaceSet.H
@@ -26,7 +26,7 @@ InNamespace
 
 Description
     Write faceSet to vtk polydata file.
-    The data are the original point ids.
+    The data are the mesh face ids.
 
 SourceFiles
     foamVtkWritePointSet.C
@@ -49,7 +49,7 @@ class fileName;
 namespace vtk
 {
 
-//- Write pointSet to vtk polydata file.
+//- Write faceSet to vtk polydata file.
 //  Only one data which is original pointID.
 void writeFaceSet
 (
diff --git a/src/meshTools/sets/topoSets/cellSet.H b/src/meshTools/sets/topoSets/cellSet.H
index 260695f6ad..da1dc407d2 100644
--- a/src/meshTools/sets/topoSets/cellSet.H
+++ b/src/meshTools/sets/topoSets/cellSet.H
@@ -65,7 +65,7 @@ public:
     // Constructors
 
         //- Construct from IOobject. No checking.
-        cellSet(const IOobject& obj);
+        explicit cellSet(const IOobject& obj);
 
         //- Construct from polyMesh and name. Checks for valid cell ids.
         cellSet
diff --git a/src/meshTools/sets/topoSets/faceSet.H b/src/meshTools/sets/topoSets/faceSet.H
index 18787ca5de..7653db1620 100644
--- a/src/meshTools/sets/topoSets/faceSet.H
+++ b/src/meshTools/sets/topoSets/faceSet.H
@@ -59,9 +59,8 @@ public:
 
     // Constructors
 
-
         //- Construct from IOobject
-        faceSet(const IOobject& obj);
+        explicit faceSet(const IOobject& obj);
 
         //- Construct from objectRegistry and name
         faceSet
diff --git a/src/meshTools/sets/topoSets/pointSet.H b/src/meshTools/sets/topoSets/pointSet.H
index c31f86e688..4f4025adc8 100644
--- a/src/meshTools/sets/topoSets/pointSet.H
+++ b/src/meshTools/sets/topoSets/pointSet.H
@@ -60,9 +60,8 @@ public:
 
     // Constructors
 
-
         //- Construct from IOobject
-        pointSet(const IOobject& obj);
+        explicit pointSet(const IOobject& obj);
 
         //- Construct from objectRegistry and name
         pointSet