Astro Tools has designed an all-new pinless universal extension socket set that is unlike anything else on the market. This Metric 78354 10-piece 3/8" Drive Pinless Universal Torque-Saver Impact Extension Socket Set has it all. 9-inch-long impact extensions with pinless universal socket ends in a compact, sturdy case with no skipped sizes, 10 to 19mm and every size in between. This forged Cro-Mo set also features something new that we're calling our "Torque Saver" design. By beefing up the pinless joint, even on smaller sizes, and increasing the shaft size, torque is delivered down the length of the tool in a more effective way than even the most expensive options on the market. Resulting in 30% more torque delivered to fasteners from your impact wrench when used at max angle and 20% more when used straight compared to other equal-length universal extension sockets, all with 360° of freedom. Astro's "anti-floppy" design has been popular among the pros and ensures that after heavy usage, pointing the extension at a bolt head will remain true instead of pointing at the ground.