BronAL Aluminum Bronze Allen Key Set – 11 Nos – 1/16” , 5/64” , 3/32” , 1/8” , 5/32” , 3/16” , 1/4” , 5/16” , 3/8” , 7/16” , 1/2” are 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”