What are knob locks?
: a door lock with a spring bolt operated by a knob and a dead bolt operated by a key.
How do you open a lock without a key?
Hold the tension wrench twisted in the correct direction and insert the rake into the lock where the teeth of the keys would go. Push and pull the rake out of the lock, twisting it and working by feel. Twist the tension wrench in the correct direction, and the lock should spring open!