Trestle bracket x2 (gorilla ladder only) with tools and case. Brand new. You cannot buy these seprately anymore From the Manufacturer. These are recommended for the type IA 300 lbs. Patented static hinges for use with Gorilla Ladders Aluminum Multi-position ladders in the scaffold position. hinge feature: -heavy-duty steel construction and provide extra stability for your Gorilla Ladders scaffold base. -convert 13, 17, or 21 foot gorilla ladder into to half sized step ladders arrangement to use with a few 2 by 6 by 8 planks or similar strong materials (gorilla sells a metal scaffold) to make yourself some cheap scaffolding for painting or scraping. • Heavy Duty Steel Construction • Patented Static Hinges for Use in the Scaffold Position • Provides Extra Stability • For use with all Aluminum Multi-Position Gorilla Ladders