The reinforced 450mm blade, whichis made of a steel that is designed to withstand the extreme conditions of use, can be cut to suit your needs. It has a double edged blade for working in both the forwards and backwards directions.
When combined with the single-wheel hoe or the Scalp Com, you can weed the following:
edges of walls;
The 450 mm collinear blade is recommended for weeding gravel paths.