eiengineering heavy duty Skeleton Buckets are manufactured from eie80 high strength steel with fully welded interlocked ribs that are built to last. The double radius design offers much greater efficiency when sieving due to the longer more rounded back area. With around 20% more sieving area, you will complete the sorting of your jobs faster with a lot less stress on your machine. Included: Pins, Bolt-On Edge Options: Teeth and Adapters, 75mm, 120mm or 150mm rib spacings. Widths: 900mm, 1100mm, 1200mm, 1500mm, 1800mm. Excavators: 1 tonne to 38 tonne.