These are bronze chisels unearthed from a stone coffin tomb in Songguk-ri, Chochon-myeon, Buyeo, Chungcheongnam-do. The groove made in the upper part of each chisel looks similar to the tang of the Liaoning-style bronze daggers found at the same site. These chisels are thus presumed to have been made by recycling the Liaoning-style bronze daggers.