Yale Locks YALV8K102K2 Window Lock Key For 8K102 (V-8K102K-2) The Yale 8K102 Lock for surface fixing to the fixed frame which is locked onto the lock plate on the window section by pushing the lock barrel. Easy-to-use push to lock system which is released by a key. Suitable for hinged timber casement windows. 1 x Spare key for 8K102 Push Button Window Lock. The additional key is ideal to stored in a safe place in case of misplacement of the original key.