Lat Support Machine In One: Scientific Force, Automatic Rebound, Easy To Use. Five Layers Of Anti-Slip Materials, Anti-Noise And Wear-Resistant: Anti-Slip Layer, Reinforcement Layer, Shock Absorption Layer, Noise Reduction Layer, And Support Layer. Design: Our Ab Roller With Automatic Rebound Technology, Automatic Steel Rebound Intelligent Auxiliary Brake, Built-In Brake System, And Steel Rebound More Smoothly.