BronAL Aluminum Bronze Double Ended Ring Spanner – 41 x 46 mmis Corrosion resistant and is mandantory for working in environments contaning flammable solid, liquids and gases.Aluminum Bronze Hand Tools are Certified for Safety as per IS 4595:1969 2006 Standards and are Torque Tested to IS 6131:1980 Standards. Do not use cheater bars or use external leverage – Misuse not covered under warranty