The new skill stop machines were introduced according to the new gambling laws of New Jersey requiring that a player should be able to control the process of gaming. In 1970s the player was able to stop each of the reels, which included a certain degree of 'skill'. In the course of slot history, new models of skill stop machines were developed.Some machines were provided with modified reel-stop handles that enabled the player to stop the reels earlier by pressing the buttons on the machine's front placed between each reel. Skill stop buttons on the slot machines appeared first in the mid-1920s.Pushing the buttons the player is able to bring any of the reels to a stop, thus getting some degree of control over the game process. While traditional slots require the players to simply push the button, skill stop machines include additional skill stop buttons placed in between the reels of the slot machine.
Skill stop machines have gained much popularity due to the fact they offer an element of skill from the player to the slot gambling process that is otherwise based on mere luck.