Infinity Tools Jointer & Planer Knives - Carbide Tipped - 20 in. x 1-3/16 in. - Set of 4 the balance of durability and cutting performance. Designed with a hi-grade micro-grain carbide cutting edge and a tough, hardened steel body, these blades provide high cutting efficiency while resisting chipping. Made in Italy, they are i for those who want the strength of solid carbide blades without the high price. These knives are 20 inches long, 1-3/16 inches wide, and come as a set of four, making them suitable for Delta 20" models, many 20" imports, and similar machines. Each blade is 1/8 inch thick and features a blank design with no holes or slots, ensuring a precise fit for your cutterhead or slightly under by 1/8 inch. Model Number: SCK070