ZoN Hand Grips http://www.amazon.com/gp/product/B005Y83SJI?tag=informasi0e-20 Use to increase finger hand and forearm strength and stamina With regular use residual effects include toning the upper arm Use For strength sport training and rehab Durable chrome-plated steel spring provides medium resistance Handles are covered in foam for comfort but provide a firm non-slip grip
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