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★Strength Training Machine★Adjustable Resistance:power twister that can adjust different resistances by turning the resistance button, which is more user-friendly than traditional spring arm strength devices. this fitness equipment adjustable from 22-440lbs with 2-20 levels. Just easily rotate the knobs, you can choose the level which suits you the best.
★HYDRAULIC PROTECTION★ It is very dangerous to use Spring Power Twister because springback is violent and fragile. The middle spring can be easily pinched. The spring is fragile even if used for a long time. Discard the Spring Power Twister. There is no risk of spring damage. Does not rebound or hurt.