For the new plan, Joe has created five workouts for each cycle, and during cycles 2 and 3, you'll need a number of different weights. If you're not working out at a gym with a full set, the most cost-effective way to do this is to buy a set of adjustable dumbbells. However, some workouts have very short rest times when swapping up or down is almost impossible, so individual ones, if you can afford them, are even better.
One of the most frequently asked questions on the Facebook group for the plan is "what weights will I need?" It honestly depends on your personal fitness levels. As someone coming to this from a very low level of fitness, I started using 2 x 4kg dumbbells and now use up to 2 x 8kg (though I often revert back to 5kg for shoulder presses). Joe uses anything from 6kg to 12kg depending on the cycle and the move — but bear in mind he does it all while talking and demonstrating!