Abstract: An attachment for a carpenter's folding ruler has an elongated body with a longitudinal slot. The slot is dimensioned to accept the ruler and the ends of the body have flat sections against which part of the ruler can be folded to form certain angles. One of the ends makes a 90.degree. angle with the axis of the slot while the other end is at some angle less than 90.degree.. A level is provided on the body so that it may be vertically or horizontally positioned.

Abstract: A horseman's pocket knife has a handle into which a plurality of useful blades can be folded. The knife includes a hoof-cutting blade with a cutting edge along one side. A hook-shaped cross section is established at the end of the hoof-cutting blade and its tip is also provided with a cutting edge. The width of the hoof-cutting blade toward the hooked end and the size of the hook are dimensioned so that the cutting blade can be folded into the handle without interferring with the handle or other blades. A hoof-cleaning blade in the shape of a hook in the plane of the blade may also be provided for removing stones and other debris from the horse's hoof.