Features: Adjustable Woodworking Tool, Cutter Blade, Calibrator Jig Gauge Adjustment Suitable for all makes and models of Surface Planers, knuckles and combination planer/thicknessers Can be used on knuckles and planers, even mold heads with 2-9/16" to 5-1/8" cutterheads Designed to adjust leveling blades precisely With two planer blades, each in a frame with magnets for firm attachment to a cutterhead. Simply place the gauge assembly on the cutting tool and then adjust the correct height of the cutting tool Simplify setting and adjustment of the cutting tool in a cutting head by stabilizing the blade of the cutting tool. Time-saving device for mounting and adjusting planer blades Made of high quality material, high strength and hardness, durable and practical Uses micro-magnet adjustable and will help you install new planer blades in perfect alignment with precision Adopts strong magnets and can hold a blade up to 20 inches in length Unique design, no need to be held in place, convenient to use Planer blade calibrators, wooden box and user manual only, other accessories demo in the picture is not included. Specification: Material: Metal Color: Black Quantity: 1 Set Package Contents: 2 x Planer Blade Sizers 1 x Wooden Box 1 x User Manual