Features:          Made of high-quality materials, high strength, high hardness, durable and practical.      Using tiny adjustable magnets, will help you install your new planer blade so it aligns precisely.     Adopts heavy duty magnets and can hold blade up to 20" length.     Unique design, no need to press down, easy to use.     Fits for all makes and models of Surface Planers, Jointers and Combination Planer/ Thicknessers.     Can be used on the planers and jointers, even molder heads with 2-9/16" to 5-1/8" cutterheads.     Designed to adjust leveling blades precisely.     With two planer blade, each within a framework with magnets for firmly attaching to a cutter for head. Simply place the gauge assembly over the cutting tool and then adjust for the correct cutting tool height.     Simplify setting and adjusting cutting tool in a cutter for head by stabilizing the cutting tool blade. for Time Saving Device when mounting and setting planer blades.     Specifications:          Material: Metal + Plastic      Color: Black      Minimum cutter shaft diameter: 75mm      Maximum cutter shaft diameter: 125 mm      Height adjustment: 22 mm      Incremental adjustment: 0.15 mm      Quantity: 2 Pcs/Set      Size: As Pictures Show      Note:          Please allow 0-1cm error due to manual measurement.       Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you      Package Included:          2x Planer Blade Calibrators      1x Wooden Box       1x User Manual