Key copying and key duplication are the most commonly used practices performed by a locksmith. Most of the time people were unable to find a difference between both. For key copying as the name suggested you were requiring original keys whose blueprint is created by the automatic machine and after some time a newly furbished key is prepared by it. On the other side for key duplication, there is no need for the original key locksmith to get it by decoding a serial number of the key mentioned on the lock body. Key copying technique is used from many years back when clay mold apparatus is used in which the original key is hardly pressed leaving behind traced data, after analyzing this a new key is prepared.
Locksmith Brooklyn is professional regarding such techniques. Now with the onset of modernization, they use most advanced automatic machines for such practices. Earlier where it takes a complete day for preparing one or two keys now multiple keys are prepared by a locksmith in one single hour.