With the Speedway Motors rivet spacing tool, accurately spacing and marking up to 20 rivet or drill holes at once is easy and accurate. This time-saving spacer is the tool for anyone needing precision spacing for drilling, riveting, etc. It is extraordinarily accurate. Just spread the accordion-style spacer to the desired distance (stamped on the tool), and then mark the spots to drill rivet holes, set screws or bolts. Mark up to 20 holes at a time in increments of 1/4" or larger, with distances from 1/2" to 2" apart. Made of high-quality stainless steel that holds up to countless openings, closings, and adjustments. Try this tool and you'll never try to eyeball along a tape measure or scale again. Engraved spacing marks. Stainless steel. Weight: 0.75 lbs. For smaller pieces of material, either use this fan without fully spreading it, or opt for our 10-hole version.