| NXOOOP15 / bolt lock with 3 key entries (release of 3 keys) 3 free keys - bolt out NX1OOP15 / bolt lock with 3 key entries (Exchange function) 1 Key trapped - 2 Keys free - bolt extended NX11OP15 / bolt lock with 3 key entries (Exchange function) 2 Keys trapped - 1 Key free - bolt extended |