"One side is a standard wall 6 point socket, but flip it over and you have a thin wall 6 point socket of the same size","Includes: 17mm, 19mm, 21mm, 13/16\" SAE, 7/8\" SAE","Set comes in a foam tray 1/2" DRIVE 5 PIECE METRIC/SAE 6 POINT THICK/THIN WALL IMPACT SOCKET SET STTF56P | Matco Tools