The ScrumTruk has now been superceded by the MyoTruk.
The MyoTruk is a more compact machine which utilises direct linkage rather than the cable and pulley system used in the ScrumTruk. This eliminates problems of cable slack and friction due to wear on cables and pulleys. Consequently it is virtually maintenance-free.
Read more about why your club, college or school should be using the MyoTruk