HackerStickers now sells progressive locks for training, this 4 lock set allows you to train starting with two pins, moving up to three pins then onto four pins and finally graduating with five pins. Two pins is a synch to pick as you graduate from this lock move onto the next lock. These progressive training locks for locksmiths and hobbyists alike are standard locks with Schlage keyways each laser engaged with the number of pins. These are crafted by Sparrow for your lock picking and training needs.
Progressive Training Locks for Lock Picking Reviews
Review Progressive Training Locks for Lock Picking