In case you missed this... It tells you it is a round head and fits the following guns.
Editorial Reviews From the Manufacturer 3-1/4-inch x .131 plain shank framing nails with full round head. Fits the following nail guns: Hitachi NR83A, NR90AC, Duofast CN350, Senco SN60, SN65, Makita AN8300, Porter Cable FR350.