IRWIN bi-metal blue blades combine the best of two metals electro-welded together. The edge of the blade is made from high-speed steel, which is much harder than standard carbon steel, and has been shown to last up to three times longer in user trials on plasterboard, drywalling, roofing, insulation, flooring and other heavy-duty materials. The bulk of the blade is made from spring steel which can resist pressure applied from the side without snapping. The high-speed steel edge, and heat treated to greater hardness for longer life and edge sharpness. The safest blade to use is generally a sharp one - as it takes less effort to cut, and therefore greater control can be maintained.
Bi-metal hybrid technology and electro-welded production produces a superior blade
The edge of the blade is made from high-speed steel which is much harder than standard carbon steel
It has been shown to last up to three times longer in user trials
Fits all standard knifes
Tough durable edge honed for maximum sharpness
Resists pressure applied from the side without snapping
Heat treated to greater hardness for longer life and edge sharpness
Cuts the toughest of materials and is perfect for cutting dry lining, insulation, flooring, roofing and more