The NEW Master System from Kreg makes perfect sense. The new Kreg Jig Master System includes the K4 Kreg JigÂ® which is the same Kreg JigÂ® being advertised in our nationally broadcast infomercial. Itâ€™s the design your customers come looking for. Kreg has added the K4MS to simplify the decision making process for the customer. Now, your customers can choose the best package for their needs. For those customers that just want the basic jig to get started with, they can choose the current Kreg JigÂ® (Model # K4). But, for those customers that are ready to experience Kreg Joinery at a higher level, the new Kreg JigÂ® Master System (Model # K4MS) will give them the same Kreg JigÂ® but with all the accessories that helps them build their projects even better and easier. For a limited time we are also including the Kreg JigÂ® Mini for repairs in tight spots.