Wheel marking gauge is a must-have gadget when you are marking precision joints. Newkiton wheel marking gauge can also be used as a depth gauge. 2 types of cutter meet your different needs. 1 cutter with bearing provides smoother cutting, works for softwood, 1 locked cutter works for hardwood. Allows you to easily slice through the wood grain, make perfect cutting marks. 2 adjustment steps, micro adjustment and coarse adjustment, they make adjustments more detailed and precise. Knurled adjustment knob and tail for faster and easier adjustment. er.20cm. Precision ground steel shank, graduated in 1mm increments for easy reference, ensures adjustments are accurate. 1.54" diameter solid brass face can slide against the edge of the workpiece for smooth marking with or against the grain. Cutter retracts into gauge face for protection when not in use and easy upright storage. Newkiton Wheel Marking Gauge 2-Stage Micro Adjustment Rolling Wheel Cutter - Coarse Adjustment - Precision Stem - Solid Brass Face