This tool can be used to keep the ends of the GT2 belt together while you remove the two screws that holds the cover plate on top of the sliding blocks.
When mounting the belt, the idea is to first slide the belt ends into the tool. The tool then keeps the belt in place, while you tighten the screws for the cover plate.
Modified PLA (PrimaSelect Satin White)
Hot End 215 °C
Bed 60 °C
3 top/bottom layers