diff --git a/README.md b/README.md
index 41a9ea7..8a42c4a 100644
--- a/README.md
+++ b/README.md
@@ -42,9 +42,9 @@ readdir('/').then((files) => {
     //   ctime: 2017-09-26T05:32:50.874Z,
     //   birthtime: 2017-09-26T05:08:14.000Z,
     //   extend: { 
-    //     number: 41453,
+    //     modeNum: 41453,
+    //     modeStr: 'lrwxr-xr-x',
     //     isSymbolicLink: true,
-    //     string: 'lrwxr-xr-x',
     //     owner: { read: true, write: true, execute: true },
     //     group: { read: true, write: false, execute: true },
     //     others: { read: true, write: false, execute: true },
@@ -90,9 +90,9 @@ getStat('/var').then((Stats) => {
   //   ctime: 2017-09-26T05:32:50.874Z,
   //   birthtime: 2017-09-26T05:08:14.000Z,
   //   extend: { 
-  //     number: 41453,
+  //     modeNum: 41453,
+  //     modeStr: 'lrwxr-xr-x',
   //     isSymbolicLink: true,
-  //     string: 'lrwxr-xr-x',
   //     owner: { read: true, write: true, execute: true },
   //     group: { read: true, write: false, execute: true },
   //     others: { read: true, write: false, execute: true },
diff --git a/index.js b/index.js
index ab99a32..49337a8 100644
--- a/index.js
+++ b/index.js
@@ -12,9 +12,9 @@ exports.getStat = async (currentPath, names) => {
       else {
         const mode = new Mode(stat);
         stat.extend = {
-          number: stat.mode,
+          modeNum: stat.mode,
+          modeStr: mode.toString(),
           isSymbolicLink: mode.isSymbolicLink(),
-          string: mode.toString(),
           owner: { ...mode.owner },
           group: { ...mode.group },
           others: { ...mode.others },