TONGXU Arm Wrestling Trainer Exerciser Forearm Equipment Grips Wrist Muscle Developer Strength Fitness Wrist and Strength Exerciser

Would of given this product 5 stars but it's hard to find a suitable surface where the suction cups can stay put so you can train hard. They will prise themselves up after a few heavy hits on this. Wetting them lightly helps somewhat. Ideally you'd want this bolted/screwed into a surface or strapped down. Other than that, excellently made, a decent amount of tension, can position your arm and wrist various leverages to make it harder or easier and hit different angles of pull. The coil and build of the contraption shows no sign of defect or weakness so it's very very durable.