The Grey Pneumatic 1107ET is a 3/8-inch drive E7 standard-length external star (Torx) impact socket. Priced around $9, it is designed strictly for heavy-duty pneumatic or cordless impact tools to prevent breakage or voiding the warranty.Key details of this socket include: Drive Size: 3/8"Output Type: External Torx / Star (E7)Length: 1.26" (Standard)Weight: 0.08 lbs