Allen Keys are made from special grade Alloy steel which withstands up to 30 Percent higher Torque as compared to Allen Keys made from CrV Steel. Higher hardness of 57 to 62 HRC offered in case of Brown Allen Keys along with superior steel properties enables up to 30 Percent higher wear resistance. Allen Keys are aesthetically good looking. It is Precisely sized, Chambered end inserts smoothly into fastener heads, reducing wear. Easy to get wrenches in and out. High visibility sized marked on case for fast selection .Long arm wrenches provide extra reach and greater torque. Allen Keys are made from Chrome Vanadium Steel which withstand up to 30 Percent higher Torque as compared to Allen Keys made from Carbon Steel. It is Heat treated for longer life, Coated and oiled for rust prevention and Anti-corrosion treatment. It has Innovative design features \"L\" shaped for easy to grip and convenient to use. High Torque, Durable metal material provides comfort, slip resistance during use and Strong grip design. Applications: Can be used on 1) Common machine parts 2) Bicycle maintenance 3) Professional Home Appliance Maintenance.