With two planer blade, each within a framework with magnets for firmly attaching to a cutter head. Simply place the gauge assembly over the cutting tool and then adjust for the correct cutting tool height Adjustable Planer Blade Cutter Calibrator Setting Jig Gauge Woodworking Tool,Fits for all makes and models of Planers, Jointers and Combination Planer/ Thicknessers,Can be used on the planers and jointers, even molder heads with 2-9/16 inch to 5-1/8 inch cutterheads,Designed to adjust leveling blades precisely Simplify setting and adjusting cutting tool in a cutter head by stabilizing the cutting tool blade. Time Saving Device when mounting and setting planer blades Made of high quality material, high strength and hardness, and practical,Uses Mini adjustable magnet and help you install new planer blades in perfect alignment with accuracy,Adopts heavy duty magnets and can hold blade up to 20 inch length design, don't need to be held down, convenient to use, and high quality, Weight: 2.8770325191 Pounds, Manufacturer: Yoeruers