This tool holds the D cell spacer material tightly as you cut a precision piece of material to your desired length. Made from solid steel DOM seamless tubing and fabricated on a mill to assure perfect alignment. Just use with a high quality hack saw and a fresh blade. Perfect cuts every time. Mark your material where you want the cut, put it in the tool and align the mark, tighten up in a vise to securely hold and cut to length. No more scrapping the spacer material.