Window Grill / Window security grills- Hong Kong

Looking for Window / Window Security Grills - Hong Kong/ Sai Kung/ Clearwater Bay

There are different pattern window security grill you can choose.

If you are looking to childproof your apartment with Window security grills. While you searching that you might consider can you remove that window grill with out damage the window, if yes, you should talk to your landlord before you install that.

The other solution maybe find the grill with no drilling require.