In the manual category of locking system mainly in earlier times lever handle category of locks are considered as the most stylish and unique kind of locks although such type of locks later in terms of popularity and demand is surpassed by the knob lock property-based locks. In lever handle locks locksmith have to install two different setups regarding locks on the same door first is the lever handle and along with that installation of the key-based lock. Later locksmith combines both different lockings setup in one form under the name of knob lock technology. Both lever handle and knob locks are installed by locksmiths inside of the door material which is different than they earlier use mainly in the form of padlocks and deadbolt locks which are handy and generally used by hanging it outside of the door for locking. Locksmith Silver Spring prefers to use knob locks mainly in residential kind of areas, according to them such locks are superior and providea premium look to the property.