The Sumner ST‑310 Hydraulic Flange Spreader (Model 784004) delivers 10 ton capacity for heavy-duty flange separation. Spreader arms adjust between 2.75″ and 8.5″ (70 to 215 mm), driven by a single-action spring-return cylinder and hardened wedge for safe splitting. Simple, efficient operation. Accessories such as a 1.5 m hand pump and hose are available separately.