This is a little burin-like tool made from nephrite that was found at a Dorset Palaeoeskimo site on Baffin Island. The site's elevation along with other diagnostic tools suggest an Early Dorset occupation.
This tabular nephrite tool, with one broken end, may be another burin-like tool that was broken through the notches and discarded. If so, it has a much larger body than little one in the first photo. It was found at a different Baffin Island site that contained many Early and also Middle Dorset tools.