Isometric Exercise Equipment reviewed the Bullworker Classic and gave it a three-star rating. All of the Bullworker devices are very similar to the Classic model. The best unit will depend on the length of the user's arms and her current fitness level.
Bullworker isometric exercise units have been manufactured since the 1960s. Currently, the manufacturer of Bullworker exercise equipment indicates that it is making Bullworker Pro and Steelbow units, as of 2014.
Over various different Bullworker models have been produced and sold. The various devices are quite similar, but differ in the length, the amount of resistance it can provide and minor details such as the presence of handles.