Using a micro-adjustable magnet, this jig will help you install new planer blades in perfect alignment with accuracy. The easiest and most efficient way to reset your blades and fits most planer blades. Simplify setting and adjusting knives in a cutter head by stabilizing the knife blade. The system consists of two gauges each within a framework featuring magnets for firmly attaching to a cutter head. Simply place the gauge assembly over the knife and then adjust for the correct knife height. Planer Blade Jig, Magnetic Planer Blade Setting Jig 2 Pack of Set Planer Blade Setter Jig Gauge Setter Wood Jointer Woodworking Tool