Check the listing for details. Knife Maker's Center Scribe Edge Line Scriber Belt Grinder Blade Making Tool 3". Color: Silver, Condition: New. Listed at 39.90 USD. Application Made for scribing center lines on your blades. Also works great for marking lines on belt grinder, blade making, custom knife, knife making equipment and so on. High Performance Specially designed to help easily and quickly scribe the perfect center lines of your barstocks or grinding knife blades, the adjustable and replaceable carbide tip can be able to mark any annealed steel bar up to 2". The Grip is about 3" long by 3/4" x 3/4". Easy Operation Used with a caliper to get precise measurement. Using the caliper get a measurement then figure out where you want your line make a small mark. Loosen the bolt head set screw on top then adjust the arm and tighten. Then run this center scribe tool down the mark to create the line. Superior Material Made from top quality and low carbon Steel for high strength, heavy duty, prevent from rust and corrosion, ensures long term reliable service. Easy Operation: Used with a caliper(NOT INCLUDED) to get precise measurement. Using the caliper get a measurement then figure out where you want your line make a small mark. Loosen the bolt head set screw on top then adjust the arm and tighten. Then run the center scribe tool down the mark to create the line. Package Includes: 1pcs Knife Maker's Center Scribe