Sheartak Spiral Cutterhead for King KC-8HJC 8" Bench Top Jointer Woodworkers are upgrading their old planers and jointers by retrofitting them with spiral cutterheads, which offer several advantages: 1. Improved Surface Finish: The spiral cutterhead features knives that are angled to produce a shear-cut, resulting in a smoother finish with no tear-out. The staggered cutting pattern is superior to a single straight cut and eliminates any roughness, even on highly figured hardwood. 2. Reduced Noise: The spiral cutterhead cuts with a staggered motion, reducing noise levels. 3. Increased Lifespan: The spiral cutterhead is made with sintered tungsten carbide inserts that have four edges, providing more than 10 times the life use of high-speed steel. 4. Easy to Change: The knives are interchangeable and precision ground to a tolerance of +/-0.0004" or +/-0.01mm. Changing knives is a breeze: loosen the screw, rotate 90° for a new edge, and tighten the insert in minutes, reducing production time by 30%. 5. Improved Dust Extraction: The spiral cutterhead produces thinner and shorter chips, making dust extraction easier. 6. Low Cost to Use: The spiral cutterhead produces a smoother finish, reducing or eliminating the need for sanding. With no sharpening required, the product pays for itself in a short time. Kit Includes: * High tensile strength alloy steel cutter block.* 34 carbide inserts installed.* 5 extra carbide inserts.* 5 extra screws. * 1 wrench