Shovel Blade Design
Different digging tools feature different blades, each suited to a particular use. For example, spades with a pointed or rounded end concentrate the digging force on a smaller surface area and cut through harder terrain more easily.
By contrast, a shovel or spade with a flatter, wider blade is suited to moving large quantities of soft earth or fine aggregates. More specialised blades, such as those found on Newcastle drainer spades, are designed to dig deep, narrow trenches and channels.