This test is used to evaluate the durability of the arms due to horizontal forces applied over time. The test applies to samples with at least one arm. The sample will be without inhibiting movement of the arms. If the sample has two arms, both arms will be tested. A 1 inch loading device will be attached to the arm close to the apparent weakest point to initially apply a horizontal force. A 100 lb. force will be applied to the arm for 50,000 cycles. The cycle rate will be set between 10 and 30 cycles per minute.