Welded structure ensures better performance and prevents oil leakages.Steel forged base for great wear and impact resistance.Heat treated lifting piston and extension screw (N/A BH4S50) allow precise height adjustment.Serrated saddle (N/A BH4S50) provides a secure lifting grip.Safety valve prevents the ram from being overextended, which would cause damage to the piston.Operating conditions: -20°C to 70°C.CE certified by Official Independent Technical Inspection Association