Manufactured from Beryllium Copper. Die forged. Twist-reverse mechanism with knurled handle for added grip and control.1/2Sq Drive Ratchet Wrench - Non-Sparking• Manufactured from Beryllium Copper.• Die forged.• Twist-reverse mechanism.• Knurled handle for added grip and control.• Length: 245mm.• Lifetime guarantee*.• Model No. NS040Model No: NS040:Brand: Premier:Drive: 1/2Sq:Length: 245mm:Nett Weight: 0.705kg:PTDSEANS040