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, dry walling, roofing, insulation, flooring and other heavy-duty materials.
- This blade stays sharp up to 3 x longer than standard blades
- High-speed steel edge
- Heat treated to greater hardness for longer life and edge sharpness
- Fits all standard knives