Designed for testing filaments or extremely fine flexible wire up to 1/32 diameter. 7/16 diameter snubber is part of precision machined swiveling fixture which assures specimen alignment with force when load is applied. All aluminum construction. Additional female adapter (aluminum) is supplied to adapt bottom grip and allow for proper alignment between grips. Capacity: 50 lb; Upper grip weight: 1-1/2 oz; Combined grip length: 5-1/8