·Multi-function trainer: Workout with our speed arm machine = Dumbbells + Arm Bar + Wrist Strengthener [Workout at the same time], it mimics the action of boxing when hitting a speedball, perfect for practicing explosive muscle strength and muscle endurance by throwing quick punches.

·Adjustable resistance: Our arm exercise equipment allows you to adjust the resistance with the knob until it meets that your training needs. Suitable for beginners, intermediates and professionals. Trainer weighs approximately 12 lbs.

·Upgraded material: This arm strengthener is made of premium cast iron, electroplated and painted for a smooth, rust-free finish. The upgraded version features enhanced iron and stainless steel materials, making it perfect for professionals aiming to further boost their forearm strength.

·Professional exercise: This rotary arm machine is a convenient way to work out your shoulders, biceps, upper back muscles and even abs.Consistent use can shape your arm lines, dramatically improve body coordination, and increase the strength of the workout area in a short period of time.

·Wide application: Saker‘s arm workout equipment can be used in any venue, gym, home, outdoor, office, etc. It's great for all the needs of strengthening upper body muscles and sculpting arms, wrists and shoulders.