The Yale PM444 series security door bolts are concealed (mortice fixed) into the door with a bolt which throws into the door frame. Operated by using the key supplied giveing added securiy and extra protection to your home.\nThe Yale YALPM444KB is 1 x Additional Key Only for PM444 Door Security Bolts. The additional key is ideal to store in a safe place in case of misplacement of the original key.\n\n--\nOur eBay Store\n\nPlease note: This item has a longer lead time for dispatch then normal as it's a non-stocked item that is ordered in, please see the estimated delivery date by eBay. We will of course ship the item sooner if possible.\n\nYale Locks PM444KB Key for Door Security Bolt\n\nProduct Details\n\nThe Yale PM444 series security door bolts are concealed (mortice fixed) into the door with a bolt which throws into the door frame. Operated by using the key supplied giveing added securiy and extra protection to your home.\nThe Yale YALPM444KB is 1 x Additional Key Only for PM444 D;