Wooden Casement Windows
Small very neat and low
profile. Chubb 8K101
A different key
section means more key differs. Chubb 8K113
Sash Windows
Dual Screws, easy to install and quite effective Chubb 8K104 
Individual keys again
better security Chubb 8K114
Chubb WS1 Sash stops ideal if you need to have the window open for ventilation but
still secure
Metal Windows
Chubb 8K100 fits to the window not the frame very effective and secure 
Chubb 8K115 designed for
difficult to secure windows
Various different window locks for every need