The Gill SR30HD is made by Woods. They definitely make good box blades. This model is definitely Heavy Duty. 84 inches wide, 25.3 cu. Ft capacity, 1/2" end plates, Weight: 1140 lbs, max tractor HP = 80. It fits a Cat I 3 pt hitch, has 8 replacable shanks. It has a retractible scarifier bar (manual, not hydraulic, but can be reached from tractor seat). Hinged "tailgate" which can be locked to act as a fixed blade.
This is definitely a heavy duty box blade, you won't be disappointed. I can't comment on the price, since it is beyond what I was even considering when I bought my blade (a Woods GB72 for $595, rated for up to 45 HP)
Hope this helps... Just happened to have the Woods Brochure near my computer.
John
