Transform your King Canada 8" Jointer KC-8J with spiral cutterheads to enjoy the following advantages: Achieve superior quality finish without any tear-out. The helical angle of the inserts is staggered, resulting in a shear-cut effect even on highly figured hardwood. Experience reduced noise levels as the spiral cutter head maintains constant contact with the board using only a few knives. Enjoy long-lasting sharpness of solid tungsten carbide cutters that outperform high-speed steel blades. When one edge becomes chipped or dull, simply rotate it 90° for a fresh, sharp edge. Each insert boasts four cutting edges and can be used four times. Effortlessly set up your jointer with precision-ground and interchangeable indexable carbide inserts that have a tight tolerance. In a matter of minutes, loosen the screws, rotate the inserts 90°, and tighten them securely. The taper hole style locking ensures accurate positioning of the inserts. Improve dust extraction with smaller carbide inserts that remove shorter and thinner materials. Benefit from long-term savings with the cost-efficient use of spiral cutter heads that can quickly pay for themselves. Spiral Cutterhead Kit includes: * High tensile strength alloy steel cutter block. * 40 carbide inserts installed. * 5 extra carbide inserts & 5 extra screws free as spare parts. * 1 Wrench