This versatile arm trainer delivers professional-grade strength training in a highly portable design. Engineered with a heavy-duty steel core and high-tensile springs, it generates adjustable resistance up to 88 lbs. For safe and smooth operation, the powerful springs are encased in a leather sheath, while the ergonomic, non-slip Nbr foam grips ensure total control and comfort during intense sessions. Its scientific design engages all major muscle groups for a complete upper-body and core workout, targeting the chest, arms, biceps, shoulders, abs, back, and thighs. Perfect for any fitness level-from beginner to elite athlete-it helps you build and tone muscle with just four 10-minute workouts per week. The compact, portable design disassembles in seconds, making it your perfect gym companion for home, the office, or travel.