With two independently adjustable rods, this gauge can scribe both sides of a mortice at once. The length of each ground stainless-steel rod is very precise. By registering the tails against either side of a chisel, you can set the cutters to span the exact width of the chisel blade. Projection is easy to set, an internal O-ring keeps light but constant friction on each rod; a thumbscrew locks the setting. One rod has its cutting edge at the extreme end of the rod, making it useful for transferring dimensions or as a depth gauge. As with all Veritas marking gauges, the wheel cutters avoid the problems of wandering that can occur with pin-style marking gauges. They cut wood fibres rather than tear them and they mark cleanly, even on cross grain. These hardened steel wheel cutters scribe perfectly at any point of their circumference. They are oriented with the cutting bevels facing in opposite directions, so you can always mark your line with the bevel facing the waste side of any cut. Each cutter is fully retractable for safe storage or to permit use with a single cutter. The rods project off-centre from the anodised aluminium body, which helps the gauge resist rolling on a workbench and maximises the area of the 50mm diameter brass face that can register against the work piece. 190mm overall length, the gauge has a setting range from zero to 145mm. The aluminium housing has a brass face and the rods are stainless steel. Made in Canada.