Yale 400-1 Regular Arm Assembly, Non-Hold Open for 51, 3000, 4400 Series

Norton 7780-1 Non-Hold Open Low Profile Regular Arm Assembly

Norton 7701-1 Regular Arm Assembly, Non-Hold Open, for 1600, 7500, 8000, 9300BC Series

Arrow DCN500A Non-Hold Open Arm for DCN500 Series

Norton 7701-3 Regular Arm Assembly, Hold Open, 1600, 7500, 8000, 9300BC Series

Corbin Russwin 688F77 Hold Open Regular Arm