NDC Deactivation/Retrofit Kits Floor Checks and Overhead Concealed Closers Floor Check Kits Part Number Description NDC-100 For Use with Center-Hung Floor Checks NDC-101-LH For Use with 3/4" Offset Floor Checks (LEFT Hand) NDC-101-RH For Use with 3/4" Offset Floor Checks (RIGHT Hand) Overhead Concealed (OHC) Kits Part Number Description NDC-102-EL For Use with OHC Closers (End Load Top Arm) NDC-102-SL-LH For Use with OHC Closers (Side Load Top Arm-LH) NDC-102-SL-RH For Use with OHC Closers (Side Load Top Arm-RH)