Things break. Especially during any phase of work that requires direct contact with rocks. We have seen our share of broken skeleton buckets (read here- cheap units from overseas). You expect them to take an incredible amount of abuse. We build them to take it. Our Extra Heavy Duty units are built with high strength, abrasion resistant AR400 steel. In fact, we're so confident in them, we put an unprecedented 3 year warranty on them. 
Call us to customize yours. 
Customization options include:
Cutting edge (vs recessed cutting bar)
Replaceable teeth (vs the built-in teeth-needs to be in tandem with cutting edge)
Thickness - 1/4 or 3/8 thick. (skid-steer attachments only. Loader attachments 1.5 yards plus all custom quotes)