• Brand: STM • Number of Leaves : 1 • : • Model Number : 5051
• Tells at a glance the correct size tap drill for machine screw tap in "NF" National Fine or "NC" National Coarse thread series • Shows the correct body size drill to use, 60 sizes shown with number and decimal equivalent of drill at each hole • Made of high quality steel • Satin chrome finish • Offer a quick and accurate way of checking drill and rod sizes