M-Sheet piles are long structural sections with a vertical interlocking system that creates a continuous wall. The walls are typically used to retain soil or water. The performance of a sheet pile section depends on its geometry and the soil into which it is driven. The pile transfers pressure from the high side of the wall to the soil in front of the wall.

Type M sheet piles, with the world's largest effective width of a single sheet pile - 900mm - can achieve a significant reduction in the number of driven blocks, number of locks, water penetration and a shorter construction period and construction cost compared to the existing sizes of 400mm and 600mm over the same construction length.