Size: T27 x 3/8"D. Overall length: 122mm. VDE certified. Manufactured to IEC60900 standards, for safe operator use on live voltages up to 1000V AC / 1500V DC. Manufactured from chrome vanadium. Suitable for use with the Laser Tools fully insulated 3/8"D ratchet (Part No. 8414) & fully insulated click type torque wrench (Part No. 8321). Additional sizes available, please see Part No. 8917 (T15), 8918 (T20), 8919 (T25), 8921 (T30) & 8922 (T40).