Model Number: 90# Brand Name: SQ Key Specifications/Special Features: The hulls use Q235as the material.stamping to take shape strong strength and lightweightWith precision welding and tool positioning in the production line, products are safe reliable,longer service lifeRotary shaft bushing use the double metal structure,copper inner and iron outsideLook hook, lock block and the wearing ring are forged piece, impact resistance and abrasion resistanceThe locking mechanism has simple structure, adjustable locking positioning, reliable force transfer Standards50#(2 inch)90#（3.5 inch） Load (T) 30—50 50 Height (mm) 185 185 Thickness(mm) 8mm 8mm/10mm