The Yale 8K102 Lock is designed for surface fixing to the fixed frame, locking onto the plate on the window section by pushing the lock barrel. It features an easy-to-use push-to-lock system that is released by a key. This lock is suitable for hinged timber casement windows. This is a spare key for the 8K102 Push Button Window Lock, ideal to store in a safe place in case the original key is misplaced.