The Astro Pneumatic Tool 78244 11-Piece 1/2. The pinless design in these sockets allow for a full 360°of freedom for the Universal head to angle and rotate. As a result, the new hex ball swivel design takes more abuse than the "winged" Designs by transferring more of the impact force to the bolt itself. This set includes one aluminum socket holder and pinless Universal impact sockets in the following sizes: 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, 24mm