ROCKWOOD 18BFB Bottom Fire Flush Bolt for Metal DoorMaterial: Stainless steel;Finishes: US32D;Features: Eliminates the bottom automatic flush bolt and dust proof strikeWhen door is subjected to 230F the plug and gray plastic cover will melt allowing the bolt to project, locking the leaves togetherUL Listed only when used with automatic top boltROCKWOOD OVERVIEWRockwood products are normally used on all types of institutional buildings, offices, retail, educational, detention, sports facilities, hotel and restaurant, and finer residences.ENVIRONMENTAL MANAGEMENTASSA ABLOY is commited to protecting the quality of the environment as well as the health and safety of its employees, customers, and the community. Please see ourEnvironmental Health and Safety Policyfor details on how we are dedicated to this commitment.RESOURCES & DOWNLOADSRockwood full line catalog