In at least one illustrative embodiment, a rotary impact tool may include an anvil and at least one hammer configured to impact the anvil to cause the anvil to rotate. The anvil may include an output shaft, a first lug extending outward in a radial direction from the output shaft and extending a first distance around the output shaft in a circumferential direction, and a second lug extending outward in the radial direction from the output shaft and extending a second distance, different from the first distance, around the output shaft in the circumferential direction.