Thumber BlockThe Thumber Block, similarly to the Thumber Wrench, is a hybridization of 2 common implements. In this case, it's a merger between a Rolling Thumber and a pinch block. The integration of the roller allows athletes to isolate either their thumb or their fingers, both configurations offering their own training benefits. The roller is recessed into the block, limiting how far the thumb and fingers can reach down underneath the roller. This creates