This is the part that matters, so read it properly.
Most home fitness purchases fail the same way. You buy one thing. It does one movement. You do that one movement until you're bored, which takes about eleven days, and then it goes under the bed.
This is built the other way round. The thirty days come first, and the kit exists to run them.
The roller handles your core. The board covers chest, shoulders and triceps across multiple hand positions. The gripper works forearms and hands while you're sat down doing nothing else. Three tools, rotating across the month, so you're not repeating yourself and you're not training the same thing two days running.

Take any one of them away and the programme stops working. That's not a sales line, it's just what a full-body month requires.