Strauss Chest Expander with 5 Springs and Adjustable Hand Grip Strengthener, (Grey/Black) Portable upper-body workout equipment for exercising any-time, anywhere. Made with chrome steel and wooden handles for enhanced quality and durability. The five spring cables instead of normal 3, brings added resistance level for a more strenuous workout. Maximum Pulling range 150 cm including the grip. Durable construction & ergonomic design Adjustable resistance - hand grip strengthener can be adjustable from 22 to 88 lbs (10 to 40 kg), it can satisfy different power levels, from the beginners to the advanced Maximum Pressure 30 Kgs each spring could subject to max 6 Kgs pulling force.