Abstract: A clamp is provided for securely holding rope, cable and similar material in a fixed position, comprising:(a) first and second clamping members of which at least one is movable towards and away from the other between clamping and releasing positions in a swinging movement about a pivot point;(b) the first clamping member having an opening therethrough for reception of a length of rope material to be held in a fixed position and having side walls on opposite sides thereof;(c) the length of rope material engaging the side wall on one side of the opening in the first clamping member;(d) the second clamping member having a clamping extension projecting into the opening through the first clamping member when the first and second clamping members are in the clamping position, and spaced away from the opening when the members are in the releasing position;(e) the extension when the second clamping member is in the clamping position being spaced from the side wall of the opening engaging the length of rope material a

Abstract: A device is disclosed to make slits through the bark of a log with a chain saw. The chain saw has a blade with a chain which runs over its extreme free end which is preferably semicircular in shape. Rotatable guide rollers are mounted on both sides of the extreme end of the blade and are preferably coaxial with the semicircular end. The lateral surfaces of the guide rollers face each other and guide rollers in operation hold the chain of the chain saw in contact with a log to be cut for cutting slits of a given depth through its bark.