ColumnUnlock

<div id="grid"></div>
<script>
$("#grid").kendoGrid({
  columns: [
    { field: "id", width: 100, locked: true },
    { field: "name", width: 100 },
    { field: "age", width: 50 }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30, id: 1 },
    { name: "John Doe", age: 33, id: 2 }
  ],
  columnMenu: true,
  columnUnlock: function(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(e.column.field); // displays the field of the just unlocked column
  }
});
</script>

<div id="grid"></div>
<script>
function grid_columnUnlock(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log(e.column.field); // displays the field of the just unlocked column
}
$("#grid").kendoGrid({
  columns: [
    { field: "id", width: 100, locked: true },
    { field: "name", width: 100 },
    { field: "age", width: 50 }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30, id: 1 },
    { name: "John Doe", age: 33, id: 2 }
  ],
  columnMenu: true
});
var grid = $("#grid").data("kendoGrid");
grid.bind("columnUnlock", grid_columnUnlock);
</script>