Base series tensioners are designed to meet specific requirements for tightening foundation bolts. They are versatile and reliable hydraulic bolt tensioners suitable for high load, tight space applications, and for variable and extended stud protrusions often relevant to wind turbine foundation bolt applications.

Optimised for use on wind turbines they have been designed for long-life, low-maintenance use, and are suitable for use on single bolts, or grouped together for multiple tightening of bolted joints.

Base tensioners are extensively used for crane slewing rings, and foundation bolting on many types of civil construction projects such as bridge building.