The innovative IRWIN® blade combines the strength of a traditional трапециевидные лезвия with the longer service life of the broken blade.Ли>
Pre-cut edges provide the user with 4 sharp points, compared to the 2 points of standard трапециевидные лезвия), which doubles the life of the blade.Ли>
four notches allow the blade to extend and maintain the correct length of the blade when you break off a portion of it.Ли>