After the successful modification of Key 053 to Magnetic Attraction tensioner  I thought I would design a key specifically for the purpose, It is one of the longest keys I've made 220mm key arm length, the attraction mode seems to be excellent but requires a good bit of leverage in the key dimensions to get the best out of the system a large size tension adjuster with tommy bar tightener and solid bearings are essential I've found, With this mag tensioner long arm and sprung contacts it is an Excellent action, one of the best keys so far.. Sadly when this key was sold it was lost in the post, I can only assume it was stolen, if anyone should come across it I can put you in touch with its rightful owner..