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+## Description
+
+You could lock sheets and exclude some of the cells.
+
+## Code
+
+```ruby
+require 'axlsx'
+
+p = Axlsx::Package.new
+wb = p.workbook
+
+s = wb.styles
+unlocked = s.add_style locked: false
+
+wb.add_worksheet(name: 'Sheet Protection') do |sheet|
+  sheet.sheet_protection do |protection|
+    protection.password = 'fish'
+    protection.auto_filter = false
+  end
+
+  sheet.add_row [1, 2, 3], style: unlocked # These cells won't be locked
+  sheet.add_row [4, 5, 6]
+  sheet.add_row [7, 8, 9]
+
+  # Set up auto filters
+  sheet.auto_filter = 'A1:C3'
+end
+
+p.serialize 'sheet_protection_example.xlsx'
+```
+
+## Output
+
+![Output](images/sheet_protection_example.png "Output")