This Master Set Contains 11 Drivers to Fit Automobiles and Trucks up to 1 Ton. This set also includes 2 handles, one for hammering and a pneumatic handle for use with an air hammer. Use the tapered driver side for bearing races; reverse to the flat side for seals. Sizes: 1.565, 1.750, 1.965To add the pneumatic handle to your current set order a 12820 pneumatic driver. Molded case., 2.325, 2.555, 2.830, 2.995, 2.470, 4.625, 3.813, 3.180. Patent: 7,707,709