Ask your Snap-on® representative for more information on how you can build the set you dream of with the right plan. How Does the Program Work? The 9100GSB0 Apprentice Set includes a well balanced selection of 1/4", 3/8", and 1/2" square drive tools, wrenches, screwdrivers, pliers, punches, and chisels — a basic set for routine maintenance work.