Boshen power twister bars are made of High grade metal wire and spring ABS cover on the joint avoiding hurts from the spring.44lbs (20KG) or 66lbs (30KG) or 88lbs (40KG) or 110Ibs (50KG) Max Load Level for choice (This is 66lbs ). Ideal size for use any place any time and any where, can be A Nice Home Training EquipmentABS handles for excellent grip, non-slip design.Fantastic Xmas gift idea for your partner or friends, ideal for working on your wrists, forearms, arms, shoulders and muscle toning.It is recommended for novices or those who exercise less arm strength, choose the starting level 44lbs, and 88 lbs or 110Ibs is suitable for someone who exercises regularly or very fit. Please select according to your own strength. User Guide Exercise method 1: Hold the bar with both hands, move inward, push down and close together (difficult, pay attention to safety) Exercise method 2: Hold the bar with both hands, move inward and push upwards together (high risk, pay attention to safety) Exercise method 3: Hold the bar with both hands and place it on top of the head, and push your palms together forward (difficult, pay attention to safety) Exercise method 4: Hold the bar with both hands and place it at your side, keep one hand still, and push the other hand upwards (difficult, pay attention to safety) Note: It is recommended for novices or those who exercise less arm strength, choose the starting level 44lbs, and 88 lbs is suitable for someone who exercises regularly or very fit.. Specifications Total length included handle 24" Spring length 11" (27cm) Weight: 2.19lbs(44lbs load), 2.47lbs(66lbs load), 3.12lbs(88lbs load) Maximum Load: 20kg/44lbs, 30kg/66lbs, 40kg/88lbs (optional) Package included: 1 x Power Twister Note There may be some measuring error because of the manual measurement, hope your tolerance. Please note any exercise should be according to one's strength. Track Page Views WithAuctiva's Counter