Astro Pneumatic 14PC 3/8" DRIVE NANO IMPACT SOCKETS - METRIC Features and Benefits: At 0.88" (22.5mm) long, sockets are 35% shorter than 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 Forged CR-MO with superior material thickness between socket body and drive compared to other sets 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. Warranty: 1 yr warranty on material and workmanship