194,041. Cook, W. H. Dec. 30, 1921. Rigid-jaw wrenches.-A rigid-jaw wrench of the kind described in Specification 19816/02 having a plane side b, and an opposite one stepped to engage nuts of different sizes, is constructed w i t h the stepped portions c, d, e, f which are parallel to the plane side b of a length equal to approximately onethird of the face of the hexagonal nut engaged by that face. This permits of a ratchet-like action, the stepped parts riding over the adjacent face of the nut on reversal and a corner of the nut riding over the plane face b. The steps g between the faces c, d, e, f may decrease in length from the jaw face c to the jaw face f.