The assembly of wood pallets, at a rate of more than 500 million units per year by more than 2500 American manufacturers, is mostly accomplished with nails and staples. The performance and useful life of these pallets are significantly influenced by the ability of these fasteners to resist relatively high impact forces during pallet use. Only a single testing device, described in ASTM Standard F 680, is available to provide the information on the impact resistance of these pallet fasteners. The accuracy, precision, and repeatability of the test data as well as the usefulness of this testing device are described by data on two types of pallet nails, obtained by single and multiple operators of this device. Among the conclusions advanced are that the mean test data are representative of the fastener performance characteristics and are repeatable and accurate if the testing device is used properly.