SKW-8 NBK Special Security Socket works for SHNRS-M8 Anti Theft Nuts-Made in JapanSKW 8 NBK Special Security Socket works for SHNRS M8 Anti Theft Nuts Made in Japan NBK SKW Special Socket for Security Anti Theft Nuts Quantity: One Characteristics: Special Socket for Security Nut. Use in combination with a commercially available impact wrench or spanner, socket wrench, or ratchet handle. O ring and pin for impact wrench are supplied.. Part Number D L B Lb SKW 8 22mm 32mm 19mm 9. 5mm