Abstract: A connector made of two pieces, each piece being a single one-piece stamping, the pieces having mutually engaging hooks forming camming elements. The pieces are mounted on the exterior surfaces of the members of the frame to be connected. The connectors at certain locations in the frame are opposite and symmentrical, but otherwise identical in construction.

Abstract: The device includes a step and a handle as separate units. The step is made of two steel rods welded together, and having a threaded screw at one end to be driven into a tree. The user detachably attaches the handle to the step, and by swinging the handle, thrusts or throws the step against the tree, starting the screw into the tree, and then turns the handle to drive the step entirely into fully secured position into the tree. The user then detaches the handle from the step and repeats the maneuver with additional steps.

Abstract: A pair of steel counterpart pieces, of steel, each being integral, and including a backing element, a side blade element, and a hook element. The side elements are on opposite side edges respectively of the backing elements. The pieces are mounted on frame members to be connected that have flat surfaces that interengage. Upon camming action between the pieces of the connector the frame members are brought toward each other with their flat surfaces interengaging.