2 Piece Set of Replacement Cutters for Solid Brass Wheel Woodworking Precision Marking Cutting Gauge with Micro Adjust Head MGBRC This is a 2 piece set of replacement cutters for Solid Brass Wheel Woodworking Precision Marking Cutting Gauge with Micro Adjust Head MGB. 3/8" diameter hardened steel This guaranteed to fit the Taylor Toolworks Solid Brass Wheel Woodworking Precision Marking Cutting Gauge