How to Attach a Chuck to a Key Holder
A chuck key holder is a handy plastic clip used to attach the chuck key to the power cord. Once the holder is attached, the chuck key will be always available exactly when you need it.
Place the chuck key holder on a flat surface. Place your drill's power cord on top of the key holder and begin looping the holder around the cord.
Push end of the holder with double holes through the slot on the opposite side of the holder.
Pull the loop tightly around the cord. Push the ends of the chuck key's handle through the holes on the opposite end of the holder.