Bison Power Tools present the single acting hollow piston cylinder  range is extremely versatile for use in tooling, maintenance and tensioning applications. Specifically designed with a hollow piston to enable a rod or cable to be passed through the entire cylinder length for applications where a pulling force is required, the range is used extensively in post-tensioning and pre-stressing applications as well as testing of various bonded or mechanical anchoring systems. BisonPowerTools hollow cylinders can also be used for general lifting applications, when fitted with readily available interchangeable hardened steel piston rod saddles.