The Astro 78314 14pc 3/8" drive Nano impact sockets – metric are made from a precision Broached forged CR-MO. At 0.88" (22.5mm) long, these top quality sockets are 35% shorter than standard shallow impact sockets and 15% shorter than other stubby impact sockets. All sockets feature a 17mm outside hex for increased access when used with a wrench.