Curl Bars Tricep Bars Dumbbell Bar. 【Product Features】There is a very specialized hex bolt at the end of the olympic bar, integral to keeping the weights in-place. 【Superior Material】This set of Hex Bolts are made of high-quality steel material which is heat treated, quenched and tempered for optimum strength, torque and ductility for safety and coated with a rust resistant finish.
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