Heavy Duty Bases are Electrically Welded, Hydraulic System is Protected from Damage by Internal By-Pass Mechanism, Industrial-Duty Construction, Lifting, Pushing, Spreading, Bending, Pressing or Straightening Capabilities, Operating Temperature range from-4 Degrees F to 158 Degrees F, Precision Machined and Polished Cylinders provide Non-Abrasive, Leak-Free, Precision machined and Polished Cylinders provide Non-Abrasive, Leak-Free, Durable Performance