QTi Non Sparking, Non Magnetic Combination Wrench Set – 25 Pcs consist of 6 ,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21, 22,23,24,25,26,27,28,30,32. These tools are Corrosion resistant and is mandantory for working in environments contaning flammable solid, liquids and gases. Copper Titanium Hand Tools are Certified for Safety as per IS 4595:1969 2006 Standards and are Torque Tested to IS 6131:1980 Standards. Copper Titanium Tools are also certified for safe use in magnetic fields upto 3 Tesla. Copper Titanium Hand Tools are 100% Beryllium Free and are much stronger than Aluminium Bronze Tools. Do not use cheater bars or use external leverage – Misuse not covered under warranty